JavaScript函数小结

JS基础知识

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 1：基础知识 

 1 创建脚本块

 1: <script language=”JavaScript”>

 2: JavaScript code goes here

 3: </script> 

 2 隐藏脚本代码

 1: <script language=”JavaScript”>

 2: <!--

 3: document.write(“Hello”);

 4: // -->

 5: </script> 

 在不支持JavaScript的浏览器中将不执行相关代码

 3 浏览器不支持的时候显示

 1: <noscript>

 2: Hello to the non-JavaScript browser.

 3: </noscript> 

 4 链接外部脚本文件

 1: <script language=”JavaScript” src="/”filename.js"”></script> 

 5 注释脚本

 1: // This is a comment

 2: document.write(“Hello”); // This is a comment

 3: /*

 4: All of this

 5: is a comment

 6: */ 

 6 输出到浏览器

 1: document.write(“<strong>Hello</strong>”); 

 7 定义变量

 1: var myVariable = “some value”; 

 8 字符串相加

 1: var myString = “String1” + “String2”; 

 9 字符串搜索

 1: <script language=”JavaScript”>

 2: <!--

 3: var myVariable = “Hello there”;

 4: var therePlace = myVariable.search(“there”);

 5: document.write(therePlace);

 6: // -->

 7: </script> 

 10 字符串替换

 1: thisVar.replace(“Monday”,”Friday”); 

 11 格式化字串

 1: <script language=”JavaScript”>

 2: <!--

 3: var myVariable = “Hello there”;

 4: document.write(myVariable.big() + “<br/>”);

 5: document.write(myVariable.blink() + “<br/>”);

 6: document.write(myVariable.bold() + “<br/>”);

 7: document.write(myVariable.fixed() + “<br/>”);

 8: document.write(myVariable.fontcolor(“red”) + “<br/>”);

 9: document.write(myVariable.fontsize(“18pt”) + “<br/>”);

 10: document.write(myVariable.italics() + “<br/>”);

 11: document.write(myVariable.small() + “<br/>”);

 12: document.write(myVariable.strike() + “<br/>”);

 13: document.write(myVariable.sub() + “<br/>”);

 14: document.write(myVariable.sup() + “<br/>”);

 15: document.write(myVariable.toLowerCase() + “<br/>”);

 16: document.write(myVariable.toUpperCase() + “<br/>”);

 17:

 18: var firstString = “My String”;

 19: var finalString = firstString.bold().toLowerCase().fontcolor(“red”);

 20: // -->

 21: </script> 

 12 创建数组

 1: <script language=”JavaScript”>

 2: <!--

 3: var myArray = new Array(5);

 4: myArray[0] = “First Entry”;

 5: myArray[1] = “Second Entry”;

 6: myArray[2] = “Third Entry”;

 7: myArray[3] = “Fourth Entry”;

 8: myArray[4] = “Fifth Entry”;

 9: var anotherArray = new Array(“First Entry”,”Second Entry”,”Third Entry”,”Fourth Entry”,”Fifth Entry”);

 10: // -->

 11: </script> 

 13 数组排序

 1: <script language=”JavaScript”>

 2: <!--

 3: var myArray = new Array(5);

 4: myArray[0] = “z”;

 5: myArray[1] = “c”;

 6: myArray[2] = “d”;

 7: myArray[3] = “a”;

 8: myArray[4] = “q”;

 9: document.write(myArray.sort());

 10: // -->

 11: </script> 

 14 分割字符串

 1: <script language=”JavaScript”>

 2: <!--

 3: var myVariable = “a,b,c,d”;

 4: var stringArray = myVariable.split(“,”);

 5: document.write(stringArray[0]);

 6: document.write(stringArray[1]);

 7: document.write(stringArray[2]);

 8: document.write(stringArray[3]);

 9: // -->

 10: </script> 

 15 弹出警告信息

 1: <script language=”JavaScript”>

 2: <!--

 3: window.alert(“Hello”);

 4: // -->

 5: </script> 

 16 弹出确认框

 1: <script language=”JavaScript”>

 2: <!--

 3: var result = window.confirm(“Click OK to continue”);

 4: // -->

 5: </script> 

 17 定义函数

 1: <script language=”JavaScript”>

 2: <!--

 3: function multiple(number1,number2) {

 4: var result = number1 * number2;

 5: return result;

 6: }

 7: // -->

 8: </script> 

 18 调用JS函数

 1: <a href=”#” onClick=”functionName()”>Link text</a>

 2: <a href="/”javascript:functionName"()”>Link text</a> 

 19 在页面加载完成后执行函数

 1: <body onLoad=”functionName();”>

 2: Body of the page

 3: </body> 

 20 条件判断

 1: <script>

 2: <!--

 3: var userChoice = window.confirm(“Choose OK or Cancel”);

 4: var result = (userChoice == true) ? “OK” : “Cancel”;

 5: document.write(result);

 6: // -->

 7: </script>

 21 指定次数循环

 1: <script>

 2: <!--

 3: var myArray = new Array(3);

 4: myArray[0] = “Item 0”;

 5: myArray[1] = “Item 1”;

 6: myArray[2] = “Item 2”;

 7: for (i = 0; i < myArray.length; i++) {

 8: document.write(myArray[i] + “<br/>”);

 9: }

 10: // -->

 11: </script> 

 22 设定将来执行

 1: <script>

 2: <!--

 3: function hello() {

 4: window.alert(“Hello”);

 5: }

 6: window.setTimeout(“hello()”,5000);

 7: // -->

 8: </script> 

 23 定时执行函数

 1: <script>

 2: <!--

 3: function hello() {

 4: window.alert(“Hello”);

 5: window.setTimeout(“hello()”,5000);

 6: }

 7: window.setTimeout(“hello()”,5000);

 8: // -->

 9: </script> 

 24 取消定时执行

 1: <script>

 2: <!--

 3: function hello() {

 4: window.alert(“Hello”);

 5: }

 6: var myTimeout = window.setTimeout(“hello()”,5000);

 7: window.clearTimeout(myTimeout);

 8: // -->

 9: </script> 

 25 在页面卸载时候执行函数

 1: <body onUnload=”functionName();”>

 2: Body of the page

 3: </body> 

 JavaScript就这么回事2：浏览器输出 

 26 访问document对象

 1: <script language=”JavaScript”>

 2: var myURL = document.URL;

 3: window.alert(myURL);

 4: </script> 

 27 动态输出HTML

 1: <script language=”JavaScript”>

 2: document.write(“<p>Here’s some information about this document:</p>”);

 3: document.write(“<ul>”);

 4: document.write(“<li>Referring Document: “ + document.referrer + “</li>”);

 5: document.write(“<li>Domain: “ + document.domain + “</li>”);

 6: document.write(“<li>URL: “ + document.URL + “</li>”);

 7: document.write(“</ul>”);

 8: </script> 

 28 输出换行

 1: document.writeln(“<strong>a</strong>”);

 2: document.writeln(“b”); 

 29 输出日期

 1: <script language=”JavaScript”>

 2: var thisDate = new Date();

 3: document.write(thisDate.toString());

 4: </script> 

 30 指定日期的时区

 1: <script language=”JavaScript”>

 2: var myOffset = -2;

 3: var currentDate = new Date();

 4: var userOffset = currentDate.getTimezoneOffset()/60;

 5: var timeZoneDifference = userOffset - myOffset;

 6: currentDate.setHours(currentDate.getHours() + timeZoneDifference);

 7: document.write(“The time and date in Central Europe is: “ + currentDate.toLocaleString());

 8: </script> 

 31 设置日期输出格式

 1: <script language=”JavaScript”>

 2: var thisDate = new Date();

 3: var thisTimeString = thisDate.getHours() + “:” + thisDate.getMinutes();

 4: var thisDateString = thisDate.getFullYear() + “/” + thisDate.getMonth() + “/” + thisDate.getDate();

 5: document.write(thisTimeString + “ on “ + thisDateString);

 6: </script> 

 32 读取URL参数

 1: <script language=”JavaScript”>

 2: var urlParts = document.URL.split(“?”);

 3: var parameterParts = urlParts[1].split(“&”);

 4: for (i = 0; i < parameterParts.length; i++) {

 5: var pairParts = parameterParts[i].split(“=”);

 6: var pairName = pairParts[0];

 7: var pairValue = pairParts[1];

 8: document.write(pairName + “ ：“ +pairValue );

 9: }

 10: </script> 

 你还以为HTML是无状态的么？

 33 打开一个新的document对象

 1: <script language=”JavaScript”>

 2: function newDocument() {

 3: document.open();

 4: document.write(“<p>This is a New Document.</p>”);

 5: document.close();

 6: }

 7: </script> 

 34 页面跳转

 1: <script language=”JavaScript”>

 2: window.location = “http://www.liu21st.com/”;

 3: </script> 

 35 添加网页加载进度窗口

 1: <html>

 2: <head>

 3: <script language=’javaScript’>

 4: var placeHolder = window.open(’holder.html’,’placeholder’,’width=200,height=200’);

 5: </script>

 6: <title>The Main Page</title>

 7: </head>

 8: <body onLoad=’placeHolder.close()’>

 9: <p>This is the main page</p>

 10: </body>

 11: </html>

 JavaScript就这么回事3：图像 

 36 读取图像属性

 1: <img src="/”image1.jpg"” name=”myImage”>

 2: <a href=”# ” onClick=”window.alert(document.myImage.width)”>Width</a>

 3: 

 37 动态加载图像

 1: <script language=”JavaScript”>

 2: myImage = new Image;

 3: myImage.src = “Tellers1.jpg”;

 4: </script> 

 38 简单的图像替换

 1: <script language=”JavaScript”>

 2: rollImage = new Image;

 3: rollImage.src = “rollImage1.jpg”;

 4: defaultImage = new Image;

 5: defaultImage.src = “image1.jpg”;

 6: </script>

 7: <a href="/”myUrl"” onMouseOver=”document.myImage.src = rollImage.src;”

 8: onMouseOut=”document.myImage.src = defaultImage.src;”>

 9: <img src="/”image1.jpg"” name=”myImage” width=100 height=100 border=0> 

 39 随机显示图像

 1: <script language=”JavaScript”>

 2: var imageList = new Array;

 3: imageList[0] = “image1.jpg”;

 4: imageList[1] = “image2.jpg”;

 5: imageList[2] = “image3.jpg”;

 6: imageList[3] = “image4.jpg”;

 7: var imageChoice = Math.floor(Math.random() * imageList.length);

 8: document.write(‘<img src=”’ + imageList[imageChoice] + ‘“>’);

 9: </script> 

 40 函数实现的图像替换

 1: <script language=”JavaScript”>

 2: var source = 0;

 3: var replacement = 1;

 4: function createRollOver(originalImage,replacementImage) {

 5: var imageArray = new Array;

 6: imageArray[source] = new Image;

 7: imageArray[source].src = originalImage;

 8: imageArray[replacement] = new Image;

 9: imageArray[replacement].src = replacementImage;

 10: return imageArray;

 11: }

 12: var rollImage1 = createRollOver(“image1.jpg”,”rollImage1.jpg”);

 13: </script>

 14: <a href=”#” onMouseOver=”document.myImage1.src = rollImage1[replacement].src;”

 15: onMouseOut=”document.myImage1.src = rollImage1[source].src;”>

 16: <img src="/”image1.jpg"” width=100 name=”myImage1” border=0>

 17: </a> 

 41 创建幻灯片

 1: <script language=”JavaScript”>

 2: var imageList = new Array;

 3: imageList[0] = new Image;

 4: imageList[0].src = “image1.jpg”;

 5: imageList[1] = new Image;

 6: imageList[1].src = “image2.jpg”;

 7: imageList[2] = new Image;

 8: imageList[2].src = “image3.jpg”;

 9: imageList[3] = new Image;

 10: imageList[3].src = “image4.jpg”;

 11: function slideShow(imageNumber) {

 12: document.slideShow.src = imageList[imageNumber].src;

 13: imageNumber += 1;

 14: if (imageNumber < imageList.length) {

 15: window.setTimeout(“slideShow(“ + imageNumber + “)”,3000);

 16: }

 17: }

 18: </script>

 19: </head>

 20: <body onLoad=”slideShow(0)”>

 21: <img src="/”image1.jpg"” width=100 name=”slideShow”> 

 42 随机广告图片

 1: <script language=”JavaScript”>

 2: var imageList = new Array;

 3: imageList[0] = “image1.jpg”;

 4: imageList[1] = “image2.jpg”;

 5: imageList[2] = “image3.jpg”;

 6: imageList[3] = “image4.jpg”;

 7: var urlList = new Array;

 8: urlList[0] = “http://some.host/”;

 9: urlList[1] = “http://another.host/”;

 10: urlList[2] = “http://somewhere.else/”;

 11: urlList[3] = “http://right.here/”;

 12: var imageChoice = Math.floor(Math.random() * imageList.length);

 13: document.write(‘<a href=”’ + urlList[imageChoice] + ‘“><img src=”’ + imageList[imageChoice] + ‘“></a>’);

 14: </script> 

 JavaScript就这么回事4：表单 

 43 表单构成

 1: <form method=”post” action=”target.html” name=”thisForm”>

 2: <input type=”text” name=”myText”>

 3: <select name=”mySelect”>

 4: <option value=”1”>First Choice</option>

 5: <option value=”2”>Second Choice</option>

 6: </select>

 7: <br/>

 8: <input type=”submit” value=”Submit Me”>

 9: </form> 

 44 访问表单中的文本框内容

 1: <form name=”myForm”>

 2: <input type=”text” name=”myText”>

 3: </form>

 4: <a href=’#’ onClick=’window.alert(document.myForm.myText.value);’>Check Text Field</a> 

 45 动态复制文本框内容

 1: <form name=”myForm”>

 2: Enter some Text: <input type=”text” name=”myText”><br/>

 3: Copy Text: <input type=”text” name=”copyText”>

 4: </form>

 5: <a href=”#” onClick=”document.myForm.copyText.value =

 6: document.myForm.myText.value;”>Copy Text Field</a> 

 46 侦测文本框的变化

 1: <form name=”myForm”>

 2: Enter some Text: <input type=”text” name=”myText” onChange=”alert(this.value);”>

 3: </form> 

 47 访问选中的Select

 1: <form name=”myForm”>

 2: <select name=”mySelect”>

 3: <option value=”First Choice”>1</option>

 4: <option value=”Second Choice”>2</option>

 5: <option value=”Third Choice”>3</option>

 6: </select>

 7: </form>

 8: <a href=’#’ onClick=’alert(document.myForm.mySelect.value);’>Check Selection List</a> 

 48 动态增加Select项

 1: <form name=”myForm”>

 2: <select name=”mySelect”>

 3: <option value=”First Choice”>1</option>

 4: <option value=”Second Choice”>2</option>

 5: </select>

 6: </form>

 7: <script language=”JavaScript”>

 8: document.myForm.mySelect.length++;

 9: document.myForm.mySelect.options[document.myForm.mySelect.length - 1].text = “3”;

 10: document.myForm.mySelect.options[document.myForm.mySelect.length - 1].value = “Third Choice”;

 11: </script> 

 49 验证表单字段

 1: <script language=”JavaScript”>

 2: function checkField(field) {

 3: if (field.value == “”) {

 4: window.alert(“You must enter a value in the field”);

 5: field.focus();

 6: }

 7: }

 8: </script>

 9: <form name=”myForm” action=”target.html”>

 10: Text Field: <input type=”text” name=”myField”onBlur=”checkField(this)”>

 11: <br/><input type=”submit”>

 12: </form> 

 50 验证Select项

 1: function checkList(selection) {

 2: if (selection.length == 0) {

 3: window.alert(“You must make a selection from the list.”);

 4: return false;

 5: }

 6: return true;

 7: }

 51 动态改变表单的action

 1: <form name=”myForm” action=”login.html”>

 2: Username: <input type=”text” name=”username”><br/>

 3: Password: <input type=”password” name=”password”><br/>

 4: <input type=”button” value=”Login” onClick=”this.form.submit();”>

 5: <input type=”button” value=”Register” onClick=”this.form.action = ‘register.html’; this.form.submit();”>

 6: <input type=”button” value=”Retrieve Password” onClick=”this.form.action = ‘password.html’; this.form.submit();”>

 7: </form> 

 52 使用图像按钮

 1: <form name=”myForm” action=”login.html”>

 2: Username: <input type=”text” name=”username”><br/>

 3: Password: <input type=”password”name=”password”><br/>

 4: <input type=”image” src="/”login.gif"” value=”Login”>

 5: </form>

 6: 

 53 表单数据的加密

 1: <SCRIPT LANGUAGE=’JavaScript’>

 2: <!--

 3: function encrypt(item) {

 4: var newItem = ’’;

 5: for (i=0; i < item.length; i++) {

 6: newItem += item.charCodeAt(i) + ’.’;

 7: }

 8: return newItem;

 9: }

 10: function encryptForm(myForm) {

 11: for (i=0; i < myForm.elements.length; i++) {

 12: myForm.elements[i].value = encrypt(myForm.elements[i].value);

 13: }

 14: }

 15:

 16: //-->

 17: </SCRIPT>

 18: <form name=’myForm’ onSubmit=’encryptForm(this); window.alert(this.myField.value);’>

 19: Enter Some Text: <input type=text name=myField><input type=submit>

 20: </form> 

 JavaScript就这么回事5：窗口和框架 

 54 改变浏览器状态栏文字提示

 1: <script language=”JavaScript”>

 2: window.status = “A new status message”;

 3: </script> 

 55 弹出确认提示框

 1: <script language=”JavaScript”>

 2: var userChoice = window.confirm(“Click OK or Cancel”);

 3: if (userChoice) {

 4: document.write(“You chose OK”);

 5: } else {

 6: document.write(“You chose Cancel”);

 7: }

 8: </script> 

 56 提示输入

 1: <script language=”JavaScript”>

 2: var userName = window.prompt(“Please Enter Your Name”,”Enter Your Name Here”);

 3: document.write(“Your Name is “ + userName);

 4: </script> 

 57 打开一个新窗口

 1: //打开一个名称为myNewWindow的浏览器新窗口

 2: <script language=”JavaScript”>

 3: window.open(“http://www.liu21st.com/”,”myNewWindow”);

 4: </script> 

 58 设置新窗口的大小

 1: <script language=”JavaScript”>

 2: window.open(“http://www.liu21st.com/”,”myNewWindow”,’height=300,width=300’);

 3: </script> 

 59 设置新窗口的位置

 1: <script language=”JavaScript”>

 2: window.open(“http://www.liu21st.com/”,”myNewWindow”,’height=300,width=300,left=200,screenX=200,top=100,screenY=100’);

 3: </script> 

 60 是否显示工具栏和滚动栏

 1: <script language=”JavaScript”>

 2: window.open(“http: 

 61 是否可以缩放新窗口的大小

 1: <script language=”JavaScript”>

 2: window.open(’http://www.liu21st.com/’ , ’myNewWindow’, ’resizable=yes’ );</script> 

 62 加载一个新的文档到当前窗口

 1: <a href=’#’ onClick=’document.location = ’125a.html’;’ >Open New Document</a> 

 63 设置页面的滚动位置

 1: <script language=”JavaScript”>

 2: if (document.all) { //如果是IE浏览器则使用scrollTop属性

 3: document.body.scrollTop = 200;

 4: } else { //如果是NetScape浏览器则使用pageYOffset属性

 5: window.pageYOffset = 200;

 6: }</script> 

 64 在IE中打开全屏窗口

 1: <a href=’#’ onClick=”window.open(’http://www.juxta.com/’,’newWindow’,’fullScreen=yes’);”>Open a full-screen window</a> 

 65 新窗口和父窗口的操作

 1: <script language=”JavaScript”>

 2: //定义新窗口

 3: var newWindow = window.open(“128a.html”,”newWindow”);

 4: newWindow.close(); //在父窗口中关闭打开的新窗口

 5: </script>

 6: 在新窗口中关闭父窗口

 7: window.opener.close() 

 66 往新窗口中写内容

 1: <script language=”JavaScript”>

 2: var newWindow = window.open(“”,”newWindow”);

 3: newWindow.document.open();

 4: newWindow.document.write(“This is a new window”);

 5: newWIndow.document.close();

 6: </script> 

 67 加载页面到框架页面

 1: <frameset cols=”50%,*”>

 2: <frame name=”frame1” src="/”135a.html"”>

 3: <frame name=”frame2” src="/”about:blank"”>

 4: </frameset>

 5: 在frame1中加载frame2中的页面

 6: parent.frame2.document.location = “135b.html”; 

 68 在框架页面之间共享脚本

 如果在frame1中html文件中有个脚本

 1: function doAlert() {

 2: window.alert(“Frame 1 is loaded”);

 3: } 

 那么在frame2中可以如此调用该方法

 1: <body onLoad=”parent.frame1.doAlert();”>

 2: This is frame 2.

 3: </body> 

 69 数据公用

 可以在框架页面定义数据项，使得该数据可以被多个框架中的页面公用

 1: <script language=”JavaScript”>

 2: var persistentVariable = “This is a persistent value”;

 3: </script>

 4: <frameset cols=”50%,*”>

 5: <frame name=”frame1” src="/”138a.html"”>

 6: <frame name=”frame2” src="/”138b.html"”>

 7: </frameset> 

 这样在frame1和frame2中都可以使用变量persistentVariable

 70 框架代码库

 根据以上的一些思路，我们可以使用一个隐藏的框架页面来作为整个框架集的代码库

 1: <frameset cols=”0,50%,*”>

 2: <frame name=”codeFrame” src="/”140code.html"”>

 3: <frame name=”frame1” src="/”140a.html"”>

 4: <frame name=”frame2” src="/”140b.html"”>

 5: </frameset>

 *************/

JS常用语句

 /*

 1.document.write(""); 输出语句

 2.JS中的注释为//

 3.传统的HTML文档顺序是:

 document->html->(head,body)

 4.一个浏览器窗口中的DOM顺序是:

 window->(navigator,screen,history,location,document)

 5.得到表单中元素的名称和值:

 document.getElementById("表单中元素的ID号").name(或value)

 6.一个小写转大写的JS:

 document.getElementById("output").value=document.getElementById("input").value.toUpperCase();

 7.JS中的值类型:

 String,Number,Boolean,Null,Object,Function

 8.JS中的字符型转换成数值型:

 parseInt(),parseFloat()

 9.JS中的数字转换成字符型:

 ("" 变量)

 10.JS中的取字符串长度是:

 (length)

 11.JS中的字符与字符相连接使用+号.

 12.JS中的比较操作符有:

 ==等于,!=不等于,>,>=,<.<=

 13.JS中声明变量使用:

 var来进行声明

 14.JS中的判断语句结构:

 if(condition){}else{}

 15.JS中的循环结构:

 for([initial expression];[condition];[upadte expression]) {inside loop}

 16.循环中止的命令是:

 break

 17.JS中的函数定义:

 function functionName([parameter],…){statement[s]}

 18.当文件中出现多个form表单时.可以用document.forms[0],document.forms[1]来代替.

 19.窗口:

 打开窗口window.open(), 关闭一个窗口:window.close(), 窗口本身:self

 20.状态栏的设置:

 window.status="字符";

 21.弹出提示信息:

 window.alert("字符");

 22.弹出确认框:

 window.confirm();

 23.弹出输入提示框:

 window.prompt();

 24.指定当前显示链接的位置:

 window.location.href="URL"

 25.取出窗体中的所有表单的数量:

 document.forms.length

 26.关闭文档的输出流:

 document.close();

 27.字符串追加连接符: =

 28.创建一个文档元素:

 document.createElement(),document.createTextNode()

 29.得到元素的方法:

 document.getElementById()

 30.设置表单中所有文本型的成员的值为空:

 var form = window.document.forms[0]

 for (var i = 0; i<form.elements.length;i ){

 if (form.elements.type == "text"){

 form.elements.value = "";

 }

 }

 31.复选按钮在JS中判断是否选中:

 document.forms[0].checkThis.checked

 (checked属性代表为是否选中返回TRUE或FALSE)

 32.单选按钮组(单选按钮的名称必须相同):

 取单选按钮组的长度document.forms[0].groupName.length

 33.单选按钮组判断是否被选中也是用checked.

 34.下拉列表框的值:

 document.forms[0].selectName.options[n].value

 (n有时用下拉列表框名称加上.selectedIndex来确定被选中的值)

 35.字符串的定义:

 var myString = new String("This is lightsword");

 36.字符串转成大写:

 string.toUpperCase(); 字符串转成小写:string.toLowerCase();

 37.返回字符串2在字符串1中出现的位置:

 String1.indexOf("String2")!=-1则说明没找到.

 38.取字符串中指定位置的一个字符:

 StringA.charAt(9);

 39.取出字符串中指定起点和终点的子字符串:

 stringA.substring(2,6);

 40.数学函数:

 Math.PI(返回圆周率),Math.SQRT2(返回开方),Math.max(value1,value2)返回两个数中的

 最在值,Math.pow(value1,10)返回value1的十次方,Math.round(value1)四舍五入函数,

 Math.floor(Math.random()*(n 1))返回随机数

 41.定义日期型变量:

 var today = new Date();

 42.日期函数列表:

 dateObj.getTime()得到时间,dateObj.getYear()得到年份,dateObj.getFullYear()得到四位的年份,

 dateObj.getMonth()得到月份,dateObj.getDate()得到日,dateObj.getDay()得到日期几,

 dateObj.getHours()得到小时,dateObj.getMinutes()得到分,dateObj.getSeconds()得到秒,

 dateObj.setTime(value)设置时间,dateObj.setYear(val)设置年,

 dateObj.setMonth(val)设置月,dateObj.setDate(val)设置日,

 dateObj.setDay(val)设置星期几,dateObj.setHours设置小时,dateObj.setMinutes(val)设置分,

 dateObj.setSeconds(val)设置秒 [注意:此日期时间从0开始计]

 43.FRAME的表示方式:

 [window.]frames[n].ObjFuncVarName,frames["frameName"].ObjFuncVarName,frameName.ObjFuncVarName

 44.parent代表父亲对象,top代表最顶端对象

 45.打开子窗口的父窗口为:opener

 46.表示当前所属的位置:this

 47.当在超链接中调用JS函数时用:(javascript :)来开头后面加函数名

 48.在老的浏览器中不执行此JS:<!– //–>

 49.引用一个文件式的JS:<script type="text/javascript" src="aaa.js"></script>

 50.指定在不支持脚本的浏览器显示的HTML:<noscript></noscript>

 51.当超链和onCLICK事件都有时,则老版本的浏览器转向a.html,否则转向b.html.

 例:<a href="a.html" onclick="location.href='b.html';return false">dfsadf</a>

 52.JS的内建对象有:

 Array,Boolean,Date,Error,EvalError,

 Function,Math,Number,Object,RangeError,ReferenceError,

 RegExp,String,SyntaxError,TypeError,URIError

 53.JS中的换行:\n

 54.窗口全屏大小:

 <script>function fullScreen(){ this.moveTo(0,0);this.outerWidth=screen.availWidth;

 this.outerHeight=screen.availHeight;}window.maximize=fullScreen;</script>

 55.JS中的all代表其下层的全部元素

 56.JS中的焦点顺序:document.getElementByid("表单元素").tabIndex = 1

 57.innerHTML的值是表单元素的值:

 如<p id="para">"how are <em>you</em>"</p>,则innerHTML的值就是:how are <em>you</em>

 58.innerTEXT的值和上面的一样,只不过不会把<em>这种标记显示出来.

 59.contentEditable可设置元素是否可被修改,isContentEditable返回是否可修改的状态.

 60.isDisabled判断是否为禁止状态.disabled设置禁止状态

 61.length取得长度,返回整型数值

 62.addBehavior()是一种JS调用的外部函数文件其扩展名为.htc

 63.window.focus()使当前的窗口在所有窗口之前.

 64.blur()指失去焦点.与FOCUS()相反.

 65.select()指元素为选中状态.

 66.防止用户对文本框中输入文本:

 onfocus="this.blur()"

 67.取出该元素在页面中出现的数量:

 document.all.tags("div(或其它HTML标记符)").length

 68.JS中分为两种窗体输出:模态和非模态.

 window.showModaldialog(),window.showModeless()

 69.状态栏文字的设置:

 window.status='文字',默认的状态栏文字设置:window.defaultStatus = '文字.';

 70.添加到收藏夹:

 external.AddFavorite("http://www.dannyg.com";,"jaskdlf");

 71.JS中遇到脚本错误时不做任何操作:

 window.onerror = doNothing; 指定错误句柄的语法为:window.onerror = handleError;

 72.JS中指定当前打开窗口的父窗口:

 window.opener,支持opener.opener…的多重继续.

 73.JS中的self指的是当前的窗口

 74.JS中状态栏显示内容:window.status="内容"

 75.JS中的top指的是框架集中最顶层的框架

 76.JS中关闭当前的窗口:window.close();

 77.JS中提出是否确认的框:if(confirm("Are you sure?")){alert("ok");}else{alert("Not Ok");}

 78.JS中的窗口重定向:window.navigate("http://www.sina.com.cn";);

 79.JS中的打印:window.print()

 80.JS中的提示输入框:window.prompt("message","defaultReply");

 81.JS中的窗口滚动条:window.scroll(x,y)

 82.JS中的窗口滚动到位置:window.scrollby

 83.JS中设置时间间隔:setInterval("expr",msecDelay)或setInterval(funcRef,msecDelay)或setTimeout

 84.JS中的模态显示在IE4 行,在NN中不行:showModalDialog("URL"[,arguments][,features]);

 85.JS中的退出之前使用的句柄:

 function verifyClose(){event.returnValue="we really like you and hope you will stay longer.";}} window.=verifyClose;

 86.当窗体第一次调用时使用的文件句柄:onload()

 87.当窗体关闭时调用的文件句柄:onunload()

 88.window.location的属性:

 protocol(http:),hostname(www.example.com),port(80),host(www.example.com:80),

 pathname("/a/a.html"),hash("#giantGizmo",指跳转到相应的锚记),href(全部的信息)

 89.window.location.reload()刷新当前页面.

 90.window.history.back()返回上一页,window.history.forward()返回下一页,

 window.history.go(返回第几页,也可以使用访问过的URL)

 91.document.write()不换行的输出,document.writeln()换行输出

 92.document.body.noWrap=true;防止链接文字折行.

 93.变量名.charAt(第几位),取该变量的第几位的字符.

 94."abc".charCodeAt(第几个),返回第几个字符的ASCii码值.

 95.字符串连接:string.concat(string2),或用 =进行连接

 96.变量.indexOf("字符",起始位置),返回第一个出现的位置(从0开始计算)

 97.string.lastIndexOf(searchString[,startIndex])最后一次出现的位置.

 98.string.match(regExpression),判断字符是否匹配.

 99.string.replace(regExpression,replaceString)替换现有字符串.

 100.string.split(分隔符)返回一个数组存储值.

 101.string.substr(start[,length])取从第几位到指定长度的字符串.

 102.string.toLowerCase()使字符串全部变为小写.

 103.string.toUpperCase()使全部字符变为大写.

 104.parseInt(string[,radix(代表进制)])强制转换成整型.

 105.parseFloat(string[,radix])强制转换成浮点型.

 106.isNaN(变量):测试是否为数值型.

 107.定义常量的关键字:const,定义变量的关键字:var

 */

JS常用函数

 //****************************************************************

 //* 名　　称：DataLength

 //* 功 能：计算数据的长度

 //* 入口参数：fData：需要计算的数据

 //* 出口参数：返回fData的长度(Unicode长度为2，非Unicode长度为1)

 //*****************************************************************

 function DataLength(fData)

 {

 var intLength=0

 for (var i=0;i {

 if ((fData.charCodeAt(i) < 0) 　　 (fData.charCodeAt(i) > 255))

 intLength=intLength+2

 else

 intLength=intLength+1

 }

 return intLength

 } 

 //****************************************************************

 //* 名　　称：DataLength

 //* 功 能：计算数据的长度

 //* 入口参数：fData：需要计算的数据

 //* 出口参数：返回fData的长度(Unicode长度为2，非Unicode长度为1)

 //*****************************************************************

 function DataLength(fData)

 {

 var intLength=0

 for (var i=0;i {

 if ((fData.charCodeAt(i) < 0) 　　 (fData.charCodeAt(i) > 255))

 intLength=intLength+2

 else

 intLength=intLength+1

 }

 return intLength

 } 

 //****************************************************************

 //* 名　　称：IsEmpty

 //* 功 能：判断是否为空

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：空

 //* False：非空

 //*****************************************************************

 function IsEmpty(fData)

 {

 return ((fData==null) 　　 (fData.length==0) )

 } 

 //****************************************************************

 //* 名　　称：IsDigit

 //* 功 能：判断是否为数字

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：是0到9的数字

 //* False：不是0到9的数字

 //*****************************************************************

 function IsDigit(fData)

 {

 return ((fData>="0") && (fData<="9"))

 } 

 //****************************************************************

 //* 名　　称：IsInteger

 //* 功 能：判断是否为正整数

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：是整数，或者数据是空的

 //* False：不是整数

 //*****************************************************************

 function IsInteger(fData)

 {

 //如果为空，返回true

 if (IsEmpty(fData))

 return true

 if ((isNaN(fData)) 　　 (fData.indexOf(".")!=-1) 　　 (fData.indexOf("-")!=-1))

 return false 

 return true

 } 

 //****************************************************************

 //* 名　　称：IsEmail

 //* 功 能：判断是否为正确的Email地址

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：正确的Email地址，或者空

 //* False：错误的Email地址

 //*****************************************************************

 function IsEmail(fData)

 {

 if (IsEmpty(fData))

 return true

 if (fData.indexOf("@")==-1)

 return false

 var NameList=fData.split("@");

 if (NameList.length!=2)

 return false

 if (NameList[0].length<1 )

 return false

 if (NameList[1].indexOf(".")<=0)

 return false

 if (fData.indexOf("@")>fData.indexOf("."))

 return false

 if (fData.indexOf(".")==fData.length-1)

 return false 

 return true

 } 

 //****************************************************************

 //* 名　　称：IsPhone

 //* 功 能：判断是否为正确的电话号码（可以含"()"、"（）"、"+"、"-"和空格）

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：正确的电话号码，或者空

 //* False：错误的电话号码

 //* 错误信息：

 //*****************************************************************

 function IsPhone(fData)

 {

 var str;

 var fDatastr="";

 if (IsEmpty(fData))

 return true

 for (var i=0;i {

 str=fData.substring(i,i+1);

 if (str!="(" && str!=")" && str!="（" && str!="）" && str!="+" && str!="-" && str!=" ")

 fDatastr=fDatastr+str;

 }

 //alert(fDatastr);

 if (isNaN(fDatastr))

 return false

 return true

 } 

 //****************************************************************

 //* 名　　称：IsPlusNumeric

 //* 功 能：判断是否为正确的正数（可以含小数部分）

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：正确的正数，或者空

 //* False：错误的正数

 //* 错误信息：

 //*****************************************************************

 function IsPlusNumeric(fData)

 {

 if (IsEmpty(fData))

 return true

 if ((isNaN(fData)) 　　 (fData.indexOf("-")!=-1))

 return false

 return true

 } 

 //****************************************************************

 //* 名　　称：IsNumeric

 //* 功 能：判断是否为正确的数字（可以为负数，小数）

 //* 入口参数：fData：要检查的数据

 //* 出口参数：True：正确的数字，或者空

 //* False：错误的数字

 //* 错误信息：

 //*****************************************************************

 function IsNumeric(fData)

 {

 if (IsEmpty(fData))

 return true

 if (isNaN(fData))

 return false 

 return true

 } 

 //****************************************************************

 //* 名　　称：IsIntegerInRange

 //* 功 能：判断一个数字是否在指定的范围内

 //* 入口参数：fInput：要检查的数据

 //* fLower：检查的范围下限，如果没有下限，请用null

 //* fHigh：检查的上限，如果没有上限，请用null

 //* 出口参数：True：在指定的范围内

 //* False：超出指定范围

 //*****************************************************************

 function IsIntegerInRange(fInput,fLower,fHigh)

 {

 if (fLower==null)

 return (fInput<=fHigh)

 else if (fHigh==null)

 return (fInput>=fLower)

 else

 return ((fInput>=fLower) && (fInput<=fHigh))

 }

弹窗代码

 // JavaScript Document

 <!--

 var nid=0;

 var tid=431;

 var mid=947;

 var full=1;

 var popDialogOptions = "dialogWidth:800px; dialogHeight:600px; dialogTop:0px; dialogLeft:0px; edge:Raised; center:0; help:0; resizable:1; scroll:1; status:0";

 var popWindowOptions = "scrollbars=1,menubar=0,toolbar=0,location=0,personalbar=0,status=0,resizable=1";

 var doexit = true;

 var usePopDialog = true;

 var isUsingSpecial = false; 

 function loadpopups(){

 if(doexit && !isUsingSpecial) {

 doexit = false;

 window.open(popURL1,"",popWindowOptions);

 }

 }

 //--> 

 // JavaScript Document 

 <!--

 var isXPSP2 = false;

 var u = "6BF52A52-394A-11D3-B153-00C04F79FAA6"; 

 //-------------------------------------------------------------------------------- 

 var str_url;

 str_url = window.location.search;    

 function ext()

 {

       if(doexit)

       {

               doexit=false; 

               if(!isXPSP2 && !usePopDialog)

               {

                         window.open(popURL1,"",popWindowOptions);

               }

               else if(!isXPSP2 && usePopDialog)

               {

                         eval("window.showModalDialog(popURL1,'',popDialogOptions)");

               }

               else

               {

                         iie.launchURL(popURL1);

               }

         }

 } 

 //-------------------------------------------------------------------------------- 

 function brs()

 {

     document.body.innerHTML+=" <object id=iie width=0 height=0 classid='CLSID:"+u+"'> </object>";

 } 

 //-------------------------------------------------------------------------------- 

 function ver()

 {

     isXPSP2 = (window.navigator.userAgent.indexOf("SV1") != -1);

     if(isXPSP2) brs();

 } 

 //--------------------------------------------------------------------------------

 var popURL1 = 'http://315party.cn/'; 

 isUsingSpecial = true; 

 if (str_url.indexOf("2005")!=-1 ||str_url.indexOf("2006")!=-1 ||str_url.indexOf("2007")!=-1)

 {

 }

 else

 {

 eval("window.attachEvent('onload',ver);");

 eval("window.attachEvent('onunload',ext);");

 } 

 //--------------------------------------------------------------------------------

 //-->

判断日期

  ------------------判断日期的函数-----------------------------------

 Private Sub javascriptPROPERTY(ByVal psCommand As String)

         Dim lsJS As String

         'Form Validation Check

         Select Case psCommand

             Case "Submit"

                 lsJS = vbCrLf & "<SCRIPT TYPE=""text/javascript"">"

                 'function QueryFormCheck

                 lsJS &= vbCrLf & "   function QueryFormCheck(){"

                 lsJS &= vbCrLf & "    if (!Portal_IsDateTime(document.all." & Me.Fromdate.ClientID & ", ""Time Period Start""))"

                 lsJS &= vbCrLf & "        return(false);"

                 lsJS &= vbCrLf & "    if (!Portal_IsDateTime(document.all." & Me.Todate.ClientID & ", ""Time Period End""))"

                 lsJS &= vbCrLf & "        return(false);"

                 lsJS &= vbCrLf & "    if (!Portal_IsTime(document.all." & Me.Starttime.ClientID & ", ""StartTime""))"

                 lsJS &= vbCrLf & "        return(false);"

                 lsJS &= vbCrLf & "    if (!Portal_IsTime(document.all." & Me.Endtime.ClientID & ", ""EndTime""))"

                 lsJS &= vbCrLf & "        return(false);"

                 lsJS &= vbCrLf & "  var a,ass,aD,aS;"

                 lsJS &= vbCrLf & "  var b,bss,bD,bS;"

                 lsJS &= vbCrLf & "  var c,css,cD,cS;"

                 lsJS &= vbCrLf & "  a=document.all." & lblParDateTime.ClientID & ".innerText;" '得到现在时间；

                 lsJS &= vbCrLf & "  b=document.all." & Fromdate.ClientID & ".value;  "   '得到选择时间；

                 lsJS &= vbCrLf & "  c=document.all." & Todate.ClientID & ".value;"

                 lsJS &= vbCrLf & "  ass=a.split(""-"");    "    '以" - "分割字符串，返回数组；

                 lsJS &= vbCrLf & "  aD=new Date(ass[0],ass[1],ass[2]);" '格式化为Date对像;

                 lsJS &= vbCrLf & "  aS=aD.getTime();" '得到从 1970 年 1 月 1 日开始计算到 Date 对象中的时间之间的毫秒数

                 lsJS &= vbCrLf & "  bss=b.split(""-"");"

                 lsJS &= vbCrLf & "  bD=new Date(bss[0],bss[1],bss[2]);"

                 lsJS &= vbCrLf & "  bS=bD.getTime();"

                 lsJS &= vbCrLf & "  css=c.split(""-"");"

                 lsJS &= vbCrLf & "  cD=new Date(css[0],css[1],css[2]);"

                 lsJS &= vbCrLf & "  cS=cD.getTime();"

                 lsJS &= vbCrLf & "  if(bS<aS){"

                 lsJS &= vbCrLf & "  alert(""开始日期不能小于今天日期!"");"

                 lsJS &= vbCrLf & "  return false;"

                 lsJS &= vbCrLf & "  }"

                 lsJS &= vbCrLf & "  if(cS<bS){"

                 lsJS &= vbCrLf & "  alert(""截至日期不能小于开始日期!"");"

                 lsJS &= vbCrLf & "  return false;"

                 lsJS &= vbCrLf & "  }"

                 lsJS &= vbCrLf & "  }"

                 'function Portal_IsDateTime

                 lsJS &= vbCrLf & "   function Portal_IsDateTime(poSource, psMessage) {"

                 lsJS &= vbCrLf & "if (!poSource) {"

                 lsJS &= vbCrLf & "alert(psMessage + ""does not exist!"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "var datetimePat = /^(\d{4}\-\d{1,2}\-\d{1,2})/;"

                 lsJS &= vbCrLf & "var matchArray = poSource.value.match(datetimePat);"

                 lsJS &= vbCrLf & "if (matchArray == null) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "  alert(psMessage + "" is invalid!\r\rDate/Time format: yyyy-mm-dd "");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "    lsDate = matchArray[1];"

                 lsJS &= vbCrLf & "lsTime = matchArray[2];"

                 lsJS &= vbCrLf & "var lsDateTime = poSource.value;"

                 lsJS &= vbCrLf & "poSource.value = lsDate;"

                 lsJS &= vbCrLf & "if (!Portal_IsDate(poSource, psMessage)) {"

                 lsJS &= vbCrLf & "poSource.value = lsDateTime;"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 'lsJS &= vbCrLf & "poSource.value = lsTime;"

                 'lsJS &= vbCrLf & "if (!Portal_IsTime(poSource, psMessage)) {"

                 'lsJS &= vbCrLf & "poSource.value = lsDateTime;"

                 'lsJS &= vbCrLf & "return(false);"

                 'lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "poSource.value = lsDateTime;"

                 lsJS &= vbCrLf & "return(true);"

                 lsJS &= vbCrLf & "}"

                 ' function Portal_IsDate

                 lsJS &= vbCrLf & "  function Portal_IsDate(poSource, psMessage) {"

                 lsJS &= vbCrLf & "if (!poSource) {"

                 lsJS &= vbCrLf & "alert(psMessage + ""does not exist!"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "var datePat = /^(\d{4})(\-)(\d{1,2})(\-)(\d{1,2})$/;"

                 lsJS &= vbCrLf & "var matchArray = poSource.value.match(datePat);"

                 lsJS &= vbCrLf & "if (matchArray == null) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & " alert(psMessage + ""is invalid!\r\rDate format: yyyy-mm-dd"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "    year = matchArray[1];"

                 lsJS &= vbCrLf & "month = matchArray[3];"

                 lsJS &= vbCrLf & "day = matchArray[5];"

                 lsJS &= vbCrLf & "if (month < 1 || month > 12) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "alert(psMessage + ""is invalid!\r\rDate format: yyyy-mm-dd"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "if (day < 1 || day > 31) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "  alert(psMessage + ""is invalid!\r\rDate format: yyyy-mm-dd"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "if ((month==4 || month==6 || month==9 || month==11) && day==31) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & " alert(psMessage + ""is invalid!\r\rDate format: yyyy-mm-dd"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "if (month == 2) {"

                 lsJS &= vbCrLf & "var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));"

                 lsJS &= vbCrLf & "if (day > 29 || (day==29 && !isleap)) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "   alert(psMessage + ""is invalid!\r* February " + "Year()" + " doesn't have " + "Day()" + " days!\r\rDate format: yyyy-mm-dd"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "return(true);"

                 lsJS &= vbCrLf & "}"

                 'function Portal_IsTime

                 lsJS &= vbCrLf & "function Portal_IsTime(poSource, psMessage) {"

                 lsJS &= vbCrLf & "if (!poSource) {"

                 lsJS &= vbCrLf & "alert(psMessage + ""does not exist!"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "var timePat = /^(\d{1,2})(:)(\d{1,2})$/;"

                 lsJS &= vbCrLf & "var matchArray = poSource.value.match(timePat);"

                 lsJS &= vbCrLf & "if (matchArray == null) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "alert(psMessage + ""is invalid!\r\rTime format: hh:mi"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "hour = matchArray[1];"

                 lsJS &= vbCrLf & "minute = matchArray[3];"

                 'lsJS &= vbCrLf & "second = matchArray[5];"

                 lsJS &= vbCrLf & "if (hour < 0 || hour > 23) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "alert(psMessage + ""is invalid!\r\Time format: hh:mi"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "if (minute < 0 || minute > 59 ) {"

                 'lsJS &= vbCrLf & "if (minute < 0 || minute > 59 || second < 0 || second > 59) {"

                 lsJS &= vbCrLf & "poSource.focus();"

                 lsJS &= vbCrLf & "alert(psMessage + ""is invalid!\r\Time format: hh:mi"");"

                 lsJS &= vbCrLf & "return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "return(true);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "</SCRIPT>"

                 Me.ClientScript.RegisterStartupScript(Me.GetType, "QueryFormCheck", lsJS)

                 Me.btnSubmit.Attributes.Add("onclick", "return(QueryFormCheck());")

         End Select

     End Sub

 --------------------------------------------------------------------------------------------------------------------

 -----------------------------调用javascript--------------------------------------------------------------------------

    javascriptPROPERTY(Me.btnSubmit.Text)

 ----------------------------------------------------------------------------------------------------------------------

判断是否是数字

 if (isNaN(txt111.value))

           {

            txt111.focus();

             alert(" 111 's value must be digit and Can't less than zero!");

             return(false);

 }

  txtLIMIT=document.getElementById("txtLIMIT");

  if (isNaN(txtLIMIT.value))

           {

            txtLIMIT.focus();

             alert(" LIMIT 's value must be digit and Can't less than zero!");

             return(false);

 }

  txtAREA=document.getElementById("txtAREA");

  if (isNaN(txtAREA.value))

           {

            txtAREA.focus();

             alert(" AREA 's value must be digit and Can't less than zero!");

             return(false);

 }

  txtSEAT=document.getElementById("txtSEAT");

  if (isNaN(txtSEAT.value))

           {

            txtSEAT.focus();

             alert(" SEAT 's value must be digit and Can't less than zero!");

             return(false);

 }

  txtLAN=document.getElementById("txtLAN");

  if (isNaN(txtLAN.value))

           {

            txtLAN.focus();

             alert(" LAN 's value must be digit and Can't less than zero!");

             return(false);

 }

判断Dropdownlist是否选中和判断两个Dropdownlist选中值的大小

 ------------------------------------判断dropdownlist是否选中-----------------------------------------------

                 lsJS &= vbCrLf & "   if(document.all." & Me.ddlSTARTTIME.ClientID & ".selectedIndex==0) "

                 lsJS &= vbCrLf & "          {"

                 lsJS &= vbCrLf & "            alert(""No StartTime is selected !"");"

                 lsJS &= vbCrLf & "            return(false);"

                 lsJS &= vbCrLf & "}"

                 lsJS &= vbCrLf & "   if(document.all." & Me.ddlENDTIME.ClientID & ".selectedIndex==0) "

                 lsJS &= vbCrLf & "          {"

                 lsJS &= vbCrLf & "            alert(""No EndTime is selected !"");"

                 lsJS &= vbCrLf & "            return(false);"

                 lsJS &= vbCrLf & "}"

 -------------------------------------end----------------------------------------------------------------------

 -----------------------------------------判断两个dropdownlist的值的大小（升序排的情况下）---------------------

                 lsJS &= vbCrLf & " var select1= (document.all." & Me.ddlSTARTTIME.ClientID & ".selectedIndex)"

                 lsJS &= vbCrLf & " var select2=(document.all." & Me.ddlENDTIME.ClientID & ".selectedIndex)"

                 lsJS &= vbCrLf & "   if(select1>select2) "

                 lsJS &= vbCrLf & "          {"

                 lsJS &= vbCrLf & "            alert("" StartTime must less then EndTime !"");"

                 lsJS &= vbCrLf & "            return(false);"

                 lsJS &= vbCrLf & "}"

 ----------------------------------------end---------------------------------------------------------------------

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