Js String 属性扩展

String.prototype.startsWith = function (startStr) {  var d = startStr.length;  return (d >= 0 && this.indexOf(startStr) == 0) }

String.prototype.endsWith = function (endStr) {  var d = this.length - endStr.length;  return (d >= 0 && this.lastIndexOf(endStr) == d) }

String.prototype.LTrim = function()
{
         return this.replace(/(^s*)/g, "");
}

String.prototype.Rtrim = function()
{
         return this.replace(/(s*$)/g, "");
}

String.prototype.Trim = function()
{
         return this.replace(/(^s*)|(s*$)/g, "");
}

String.prototype.Left = function(len)
{
         if(isNaN(len)||len==null)
         {
                 len = this.length;
         }
         else
         {
                 if(parseInt(len)<0||parseInt(len)>this.length)
                 {
                         len = this.length;
                 }
         }
         return this.substr(0,len);
}

String.prototype.Right = function(len)
{
         if(isNaN(len)||len==null)
         {
                 len = this.length;
         }
         else
         {
                 if(parseInt(len)<0||parseInt(len)>this.length)
                 {
                         len = this.length;
                 }
         }
         return this.substring(this.length-len,this.length);
}

String.prototype.Mid = function(start,len)
{
         return this.substr(start,len);
}

String.prototype.InStr = function(str)
{
         if(str==null)
         {
                 str = "";
         }
         return this.indexOf(str);
}

String.prototype.InStrRev = function(str)
{
         if(str==null)
         {
                 str = "";
         }
         return this.lastIndexOf(str);
}

String.prototype.LengthW = function()
{
         return this.replace(/[^x00-xff]/g,"**").length;
}

String.prototype.isIP = function()
{
         var reSpaceCheck = /^(d+).(d+).(d+).(d+)$/;
         if (reSpaceCheck.test(this))
         {
                 this.match(reSpaceCheck);
                 if (RegExp.$1 <= 255 && RegExp.$1 >= 0
                  && RegExp.$2 <= 255 && RegExp.$2 >= 0
                  && RegExp.$3 <= 255 && RegExp.$3 >= 0
                  && RegExp.$4 <= 255 && RegExp.$4 >= 0)
                 {
                         return true;
                 }
                 else
                 {
                         return false;
                 }
         }
         else
         {
                 return false;
         }
}

String.prototype.isLongDate = function()
{
         var r = this.replace(/(^s*)|(s*$)/g, "").match(/^(d{1,4})(-|/)(d{1,2})2(d{1,2}) (d{1,2}):(d{1,2}):(d{1,2})$/);
         if(r==null)
         {
                 return false;
         }
         var d = new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]);
         return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]);
}

String.prototype.isShortDate = function()
{
         var r = this.replace(/(^s*)|(s*$)/g, "").match(/^(d{1,4})(-|/)(d{1,2})2(d{1,2})$/);
         if(r==null)
         {
                 return false;
         }
         var d = new Date(r[1], r[3]-1, r[4]);
         return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}

String.prototype.isDate = function()
{
         return this.isLongDate()||this.isShortDate();
}

String.prototype.isMobile = function()
{
         return /^0{0,1}13[0-9]{9}$/.test(this);
}

String.prototype.isEmail = function()
{
         return /^w+((-w+)|(.w+))*@[A-Za-z0-9]+((.|-)[A-Za-z0-9]+)*.[A-Za-z0-9]+$/.test(this);
}

String.prototype.isZipCode = function()
{
         return /^[d]{6}$/.test(this);
}

String.prototype.existChinese = function()
{
         //[u4E00-u9FA5]為漢字﹐[uFE30-uFFA0]為全角符號
         return /^[x00-xff]*$/.test(this);
}

String.prototype.isFileName = function()
{
         return !/[
String.prototype.isUrl = function()
{
         return /^http[s]?://([w-]+.)+[w-]+([w-./?%&=]*)?$/i.test(this);
}

String.prototype.isIDCard = function()
{
         var iSum=0;
         var info="";
         var sId = this;
         var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"};
         if(!/^d{17}(d|x)$/i.test(sId))
         {
                 return false;
         }
         sId=sId.replace(/x$/i,"a");
         //非法地区
         if(aCity[parseInt(sId.substr(0,2))]==null)
         {
                 return false;
         }
         var sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2));
         var d=new Date(sBirthday.replace(/-/g,"/"))
         //非法生日
         if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))
         {
                 return false;
         }
         for(var i = 17;i>=0;i--)
         {
                 iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11);
         }
         if(iSum%11!=1)
         {
                 return false;
         }
         return true;
}

String.prototype.isPhoneCall = function()
{
         return /(^[0-9]{3,4}-[0-9]{3,8}$)|(^[0-9]{3,8}$)|(^([0-9]{3,4})[0-9]{3,8}$)|(^0{0,1}13[0-9]{9}$)/.test(this);
}

String.prototype.isNumeric = function(flag)
{
         //验证是否是数字
         if(isNaN(this))
         {
                 return false;
         }
         switch(flag)
         {
                 case null:         //数字
                 case "":
                         return true;
                 case "+":         //正数
                         return                 /(^+?|^d?)d*.?d+$/.test(this);
                 case "-":         //负数
                         return                 /^-d*.?d+$/.test(this);
                 case "i":         //整数
                         return                 /(^-?|^+?|d)d+$/.test(this);
                 case "+i":         //正整数
                         return                 /(^d+$)|(^+?d+$)/.test(this);
                 case "-i":         //负整数
                         return                 /^[-]d+$/.test(this);
                 case "f":         //浮点数
                         return                 /(^-?|^+?|^d?)d*.d+$/.test(this);
                 case "+f":         //正浮点数
                         return                 /(^+?|^d?)d*.d+$/.test(this);
                 case "-f":         //负浮点数
                         return                 /^[-]d*.d$/.test(this);
                 default:         //缺省
                         return true;
         }
}

String.prototype.IsColor = function()
{
         var temp         = this;
         if (temp=="") return true;
         if (temp.length!=7) return false;
         return (temp.search(/#[a-fA-F0-9]{6}/) != -1);
}

String.prototype.toCase = function()
{
         var tmp = "";
         for(var i=0;i<this.length;i++)
         {
                 if(this.charCodeAt(i)>0&&this.charCodeAt(i)<255)
                 {
                         tmp += String.fromCharCode(this.charCodeAt(i)+65248);
                 }
                 else
                 {
                         tmp += String.fromCharCode(this.charCodeAt(i));
                 }
         }
         return tmp
}

String.prototype.toHtmlEncode = function()
{
         var str = this;
         str=str.replace(/&/g,"&");
         str=str.replace(/</g,"<");
         str=str.replace(/>/g,">");
         str=str.replace(/'/g,"&apos;");
         str=str.replace(/"/g,""");
         str=str.replace(/n/g,"<br>");
         str=str.replace(/ /g," ");
         str=str.replace(/t/g,"    ");
         return str;
}

String.prototype.toDate = function()
{
         try
         {
                 return new Date(this.replace(/-/g, "/"));
         }
         catch(e)
         {
                 return null;
         }
}
1.Asc(x),Chr(x):转换字符，字符码
2。Filter:搜寻字符串数组中的特定字符串
格式：v=filter(x,s[,include[,compare]])
实例：
Dim x()={"kjwang","wangkj","peter"}
Dim v
v=filter(x,"kj") '结果v(0)="kjwang",v(1)="wangkj"
v=filter(x,"kj",false) '结果v(0)="peter"
v=filter(x,"kj",true,vbTextCompare) '不分大小写搜寻
3.InStr:寻找字符串位置(InstrRev:倒过来寻找字符串）
格式：
v=instr(x,y) '从x字符串第1个字符起找出y字符串出现的位置
v=instr(n,x,y) '从x字符串第n个字符起找出y字符串出现的位置
格式：
v=InstrRev(x,s[,n[,Compare]])
4。Join:将字符串连接
格式：v=join(x[,d]）’d为分隔字符
5。Len(x):计算字符串x的长度
格式：v=len(x)
6.Left(x,n):返回字符串x左边n个字符(对应Right(x,n))
7。Mid:读取字符串x中间的字符
格式：v=mid(x,n,m)
8。LTrim(x),RTim(x),Trim(x)去空白字符
9.Replace:字符串取代
格式：v=Replace(x,s,r)
实例：x="i saw a saw a saw"
v=replace(x,"saw","so") 'v="i so a so a so"
10.Split:字符串分割
格式：v=split(s[,d])
实例：v=split("vb.net,iis6.0,asp.net",",")
'结果v(0)="vb.net",v(1)="iis6.0",v(2)="asp.net"
11.StrReverse:反转字符串
实例：v=strreverse("kjwang") 'v="gnawjk"
12.UCase(x),LCase(x):变换英文字母的大小写
实例：x="hello,VB中文!"
v=UCase(x) 'v="HELLO,VB中文！"
1.取出日期时间
－1）DateValue(x),TimeValue(x)
格式：v=DateValue(x) :取出的“日期”部分
v=timevalue(x) '类上
－2）Year(x),Month(x),Day(x)
格式：v=Year(x)
v=Month(x)
v=Day(x)
Hour(x),Minute(x),Second(x):取出时，分，秒
－3）DateSerial(Y,M,D):合并年、月、日成为日期
实例：Dim v
v=DateSerial(1996,10,5) 'v=1996/10/5
TimeSerial(H,M,S):合并时、分、秒成为时间
2.Now:读取系统日期时间
格式：v=now
3.Timer:从凌晨12：00：00AM起所经过的秒数
格式：v=timer
4.DatePart(p,x):取出年、月、日等各部分的数值
实例：Dim X=#2/10/1996 16:45:30#
v=DatePart("yyyy",X) 'v=1996年
v=DatePart("m",X) 'v=2月
v=DatePart("d",X) 'v=10日
v=DatePart("h",X) 'v=16时
v=DatePart("n",X) 'v=45分
v=DatePart("s",X) 'v=30秒
v=DatePart("q",X) 'v=1季（第一季，春季）
v=DatePart("y",X) 'v=41天（1996年的第41天）
v=DatePart("ww",X) 'v=6周（1996年的第6周）
v=DatePart("w",X) 'v=7（第6周的第7天，即星期六）
5。DateAdd(p,n,x):加减若干时间后的新日期时间
格式：v=DateAdd(p,n,x) 'p值同上如："yyyy"、"m"等
实例：Dim x=#1/31/1996 16:45:30#
v=dateadd("yyyy",-3,x) '减3年，v=1993/1/31 16:45:30
6.DateDiff(p,x1,x2):计算两日期时间的差值 'p值同上
实例：dim x1=#12/31/1996 16:45:30#
x2=#2/10/1997 9:30:50#
v=datediff("yyyy",x1,x2) 'v=1年
7。FormatDateTime:日期时间的格式化
格式：v=formatdateyime(x[,日期格式])
日期格式值：DateFormat.GeneralDate　、　DateFormat.LongDate、
DateFotmat.ShortDate、DateFormat.LongTime、DateFormat.ShortTime
8.MonthName:返回月份名称
实例：v=monthname(5) 'v="五月"
9.WeekDayName:返回星期名称　’用法同8