IE6下有时候png格式的图片会存在背景的问题,以下是我常用的解决办法:

<!--[if IE 6]>
<script src="js/DD_belatedPNG_0.0.8a.js"></script>
<script>
DD_belatedPNG.fix('*');
</script>
<![endif]-->
DD_belatedPNG_0.0.8a.js 代码如下:
/**
* DD_belatedPNG: Adds IE6 support: PNG images for CSS background-image and HTML <IMG/>.
* Author: Drew Diller
* Email: drew.diller@gmail.com
* URL: http://www.dillerdesign.com/experiment/DD_belatedPNG/
* Version: 0.0.8a
* Licensed under the MIT License: http://dillerdesign.com/experiment/DD_belatedPNG/#license
*
* Example usage:
* DD_belatedPNG.fix('.png_bg'); // argument is a CSS selector
* DD_belatedPNG.fixPng( someNode ); // argument is an HTMLDomElement
**/ /*
PLEASE READ:
Absolutely everything in this script is SILLY. I know this. IE's rendering of certain pixels doesn't make sense, so neither does this code!
*/ var DD_belatedPNG = {
ns: 'DD_belatedPNG',
imgSize: {},
delay: 10,
nodesFixed: 0,
createVmlNameSpace: function () { /* enable VML */
if (document.namespaces && !document.namespaces[this.ns]) {
document.namespaces.add(this.ns, 'urn:schemas-microsoft-com:vml');
}
},
createVmlStyleSheet: function () { /* style VML, enable behaviors */
/*
Just in case lots of other developers have added
lots of other stylesheets using document.createStyleSheet
and hit the 31-limit mark, let's not use that method!
further reading: http://msdn.microsoft.com/en-us/library/ms531194(VS.85).aspx
*/
var screenStyleSheet, printStyleSheet;
screenStyleSheet = document.createElement('style');
screenStyleSheet.setAttribute('media', 'screen');
document.documentElement.firstChild.insertBefore(screenStyleSheet, document.documentElement.firstChild.firstChild);
if (screenStyleSheet.styleSheet) {
screenStyleSheet = screenStyleSheet.styleSheet;
screenStyleSheet.addRule(this.ns + '\\:*', '{behavior:url(#default#VML)}');
screenStyleSheet.addRule(this.ns + '\\:shape', 'position:absolute;');
screenStyleSheet.addRule('img.' + this.ns + '_sizeFinder', 'behavior:none; border:none; position:absolute; z-index:-1; top:-10000px; visibility:hidden;'); /* large negative top value for avoiding vertical scrollbars for large images, suggested by James O'Brien, http://www.thanatopsic.org/hendrik/ */
this.screenStyleSheet = screenStyleSheet; /* Add a print-media stylesheet, for preventing VML artifacts from showing up in print (including preview). */
/* Thanks to R�mi Pr�vost for automating this! */
printStyleSheet = document.createElement('style');
printStyleSheet.setAttribute('media', 'print');
document.documentElement.firstChild.insertBefore(printStyleSheet, document.documentElement.firstChild.firstChild);
printStyleSheet = printStyleSheet.styleSheet;
printStyleSheet.addRule(this.ns + '\\:*', '{display: none !important;}');
printStyleSheet.addRule('img.' + this.ns + '_sizeFinder', '{display: none !important;}');
}
},
readPropertyChange: function () {
var el, display, v;
el = event.srcElement;
if (!el.vmlInitiated) {
return;
}
if (event.propertyName.search('background') != -1 || event.propertyName.search('border') != -1) {
DD_belatedPNG.applyVML(el);
}
if (event.propertyName == 'style.display') {
display = (el.currentStyle.display == 'none') ? 'none' : 'block';
for (v in el.vml) {
if (el.vml.hasOwnProperty(v)) {
el.vml[v].shape.style.display = display;
}
}
}
if (event.propertyName.search('filter') != -1) {
DD_belatedPNG.vmlOpacity(el);
}
},
vmlOpacity: function (el) {
if (el.currentStyle.filter.search('lpha') != -1) {
var trans = el.currentStyle.filter;
trans = parseInt(trans.substring(trans.lastIndexOf('=')+1, trans.lastIndexOf(')')), 10)/100;
el.vml.color.shape.style.filter = el.currentStyle.filter; /* complete guesswork */
el.vml.image.fill.opacity = trans; /* complete guesswork */
}
},
handlePseudoHover: function (el) {
setTimeout(function () { /* wouldn't work as intended without setTimeout */
DD_belatedPNG.applyVML(el);
}, 1);
},
/**
* This is the method to use in a document.
* @param {String} selector - REQUIRED - a CSS selector, such as '#doc .container'
**/
fix: function (selector) {
if (this.screenStyleSheet) {
var selectors, i;
selectors = selector.split(','); /* multiple selectors supported, no need for multiple calls to this anymore */
for (i=0; i<selectors.length; i++) {
this.screenStyleSheet.addRule(selectors[i], 'behavior:expression(DD_belatedPNG.fixPng(this))'); /* seems to execute the function without adding it to the stylesheet - interesting... */
}
}
},
applyVML: function (el) {
el.runtimeStyle.cssText = '';
this.vmlFill(el);
this.vmlOffsets(el);
this.vmlOpacity(el);
if (el.isImg) {
this.copyImageBorders(el);
}
},
attachHandlers: function (el) {
var self, handlers, handler, moreForAs, a, h;
self = this;
handlers = {resize: 'vmlOffsets', move: 'vmlOffsets'};
if (el.nodeName == 'A') {
moreForAs = {mouseleave: 'handlePseudoHover', mouseenter: 'handlePseudoHover', focus: 'handlePseudoHover', blur: 'handlePseudoHover'};
for (a in moreForAs) {
if (moreForAs.hasOwnProperty(a)) {
handlers[a] = moreForAs[a];
}
}
}
for (h in handlers) {
if (handlers.hasOwnProperty(h)) {
handler = function () {
self[handlers[h]](el);
};
el.attachEvent('on' + h, handler);
}
}
el.attachEvent('onpropertychange', this.readPropertyChange);
},
giveLayout: function (el) {
el.style.zoom = 1;
if (el.currentStyle.position == 'static') {
el.style.position = 'relative';
}
},
copyImageBorders: function (el) {
var styles, s;
styles = {'borderStyle':true, 'borderWidth':true, 'borderColor':true};
for (s in styles) {
if (styles.hasOwnProperty(s)) {
el.vml.color.shape.style[s] = el.currentStyle[s];
}
}
},
vmlFill: function (el) {
if (!el.currentStyle) {
return;
} else {
var elStyle, noImg, lib, v, img, imgLoaded;
elStyle = el.currentStyle;
}
for (v in el.vml) {
if (el.vml.hasOwnProperty(v)) {
el.vml[v].shape.style.zIndex = elStyle.zIndex;
}
}
el.runtimeStyle.backgroundColor = '';
el.runtimeStyle.backgroundImage = '';
noImg = true;
if (elStyle.backgroundImage != 'none' || el.isImg) {
if (!el.isImg) {
el.vmlBg = elStyle.backgroundImage;
el.vmlBg = el.vmlBg.substr(5, el.vmlBg.lastIndexOf('")')-5);
}
else {
el.vmlBg = el.src;
}
lib = this;
if (!lib.imgSize[el.vmlBg]) { /* determine size of loaded image */
img = document.createElement('img');
lib.imgSize[el.vmlBg] = img;
img.className = lib.ns + '_sizeFinder';
img.runtimeStyle.cssText = 'behavior:none; position:absolute; left:-10000px; top:-10000px; border:none; margin:0; padding:0;'; /* make sure to set behavior to none to prevent accidental matching of the helper elements! */
imgLoaded = function () {
this.width = this.offsetWidth; /* weird cache-busting requirement! */
this.height = this.offsetHeight;
lib.vmlOffsets(el);
};
img.attachEvent('onload', imgLoaded);
img.src = el.vmlBg;
img.removeAttribute('width');
img.removeAttribute('height');
document.body.insertBefore(img, document.body.firstChild);
}
el.vml.image.fill.src = el.vmlBg;
noImg = false;
}
el.vml.image.fill.on = !noImg;
el.vml.image.fill.color = 'none';
el.vml.color.shape.style.backgroundColor = elStyle.backgroundColor;
el.runtimeStyle.backgroundImage = 'none';
el.runtimeStyle.backgroundColor = 'transparent';
},
/* IE can't figure out what do when the offsetLeft and the clientLeft add up to 1, and the VML ends up getting fuzzy... so we have to push/enlarge things by 1 pixel and then clip off the excess */
vmlOffsets: function (el) {
var thisStyle, size, fudge, makeVisible, bg, bgR, dC, altC, b, c, v;
thisStyle = el.currentStyle;
size = {'W':el.clientWidth+1, 'H':el.clientHeight+1, 'w':this.imgSize[el.vmlBg].width, 'h':this.imgSize[el.vmlBg].height, 'L':el.offsetLeft, 'T':el.offsetTop, 'bLW':el.clientLeft, 'bTW':el.clientTop};
fudge = (size.L + size.bLW == 1) ? 1 : 0;
/* vml shape, left, top, width, height, origin */
makeVisible = function (vml, l, t, w, h, o) {
vml.coordsize = w+','+h;
vml.coordorigin = o+','+o;
vml.path = 'm0,0l'+w+',0l'+w+','+h+'l0,'+h+' xe';
vml.style.width = w + 'px';
vml.style.height = h + 'px';
vml.style.left = l + 'px';
vml.style.top = t + 'px';
};
makeVisible(el.vml.color.shape, (size.L + (el.isImg ? 0 : size.bLW)), (size.T + (el.isImg ? 0 : size.bTW)), (size.W-1), (size.H-1), 0);
makeVisible(el.vml.image.shape, (size.L + size.bLW), (size.T + size.bTW), (size.W), (size.H), 1 );
bg = {'X':0, 'Y':0};
if (el.isImg) {
bg.X = parseInt(thisStyle.paddingLeft, 10) + 1;
bg.Y = parseInt(thisStyle.paddingTop, 10) + 1;
}
else {
for (b in bg) {
if (bg.hasOwnProperty(b)) {
this.figurePercentage(bg, size, b, thisStyle['backgroundPosition'+b]);
}
}
}
el.vml.image.fill.position = (bg.X/size.W) + ',' + (bg.Y/size.H);
bgR = thisStyle.backgroundRepeat;
dC = {'T':1, 'R':size.W+fudge, 'B':size.H, 'L':1+fudge}; /* these are defaults for repeat of any kind */
altC = { 'X': {'b1': 'L', 'b2': 'R', 'd': 'W'}, 'Y': {'b1': 'T', 'b2': 'B', 'd': 'H'} };
if (bgR != 'repeat' || el.isImg) {
c = {'T':(bg.Y), 'R':(bg.X+size.w), 'B':(bg.Y+size.h), 'L':(bg.X)}; /* these are defaults for no-repeat - clips down to the image location */
if (bgR.search('repeat-') != -1) { /* now let's revert to dC for repeat-x or repeat-y */
v = bgR.split('repeat-')[1].toUpperCase();
c[altC[v].b1] = 1;
c[altC[v].b2] = size[altC[v].d];
}
if (c.B > size.H) {
c.B = size.H;
}
el.vml.image.shape.style.clip = 'rect('+c.T+'px '+(c.R+fudge)+'px '+c.B+'px '+(c.L+fudge)+'px)';
}
else {
el.vml.image.shape.style.clip = 'rect('+dC.T+'px '+dC.R+'px '+dC.B+'px '+dC.L+'px)';
}
},
figurePercentage: function (bg, size, axis, position) {
var horizontal, fraction;
fraction = true;
horizontal = (axis == 'X');
switch(position) {
case 'left':
case 'top':
bg[axis] = 0;
break;
case 'center':
bg[axis] = 0.5;
break;
case 'right':
case 'bottom':
bg[axis] = 1;
break;
default:
if (position.search('%') != -1) {
bg[axis] = parseInt(position, 10) / 100;
}
else {
fraction = false;
}
}
bg[axis] = Math.ceil( fraction ? ( (size[horizontal?'W': 'H'] * bg[axis]) - (size[horizontal?'w': 'h'] * bg[axis]) ) : parseInt(position, 10) );
if (bg[axis] % 2 === 0) {
bg[axis]++;
}
return bg[axis];
},
fixPng: function (el) {
el.style.behavior = 'none';
var lib, els, nodeStr, v, e;
if (el.nodeName == 'BODY' || el.nodeName == 'TD' || el.nodeName == 'TR') { /* elements not supported yet */
return;
}
el.isImg = false;
if (el.nodeName == 'IMG') {
if(el.src.toLowerCase().search(/\.png$/) != -1) {
el.isImg = true;
el.style.visibility = 'hidden';
}
else {
return;
}
}
else if (el.currentStyle.backgroundImage.toLowerCase().search('.png') == -1) {
return;
}
lib = DD_belatedPNG;
el.vml = {color: {}, image: {}};
els = {shape: {}, fill: {}};
for (v in el.vml) {
if (el.vml.hasOwnProperty(v)) {
for (e in els) {
if (els.hasOwnProperty(e)) {
nodeStr = lib.ns + ':' + e;
el.vml[v][e] = document.createElement(nodeStr);
}
}
el.vml[v].shape.stroked = false;
el.vml[v].shape.appendChild(el.vml[v].fill);
el.parentNode.insertBefore(el.vml[v].shape, el);
}
}
el.vml.image.shape.fillcolor = 'none'; /* Don't show blank white shapeangle when waiting for image to load. */
el.vml.image.fill.type = 'tile'; /* Makes image show up. */
el.vml.color.fill.on = false; /* Actually going to apply vml element's style.backgroundColor, so hide the whiteness. */
lib.attachHandlers(el);
lib.giveLayout(el);
lib.giveLayout(el.offsetParent);
el.vmlInitiated = true;
lib.applyVML(el); /* Render! */
}
};
try {
document.execCommand("BackgroundImageCache", false, true); /* TredoSoft Multiple IE doesn't like this, so try{} it */
} catch(r) {}
DD_belatedPNG.createVmlNameSpace();
DD_belatedPNG.createVmlStyleSheet();

解决IE6下 PNG图片有背景问题的更多相关文章

  1. 解决IE6下透明图片有背景的问题

    描述,透底的图片,在其他浏览器中效果: 在IE6中的效果:  1.改图片 IMG 换用gif格式的图片,但是这样的话图片效果不好: 想让IE6用gif的图片,其他浏览器用png图片,但是只有IE有这样 ...

  2. 解决IE6下png图片透明度不显示的问题

    世界上最遥远的距离,不外乎我在搞前端,你却在用旧IE,现在随着XP要退休了,IE6的市场占有率应该也会逐步下滑.不过基于天朝人民的惰性以及企鹅微软的“扎篱笆”活动,做网站的朋友依旧不能忽视IE6的存在 ...

  3. 解决IE6下png图片不透明

    ie6着实是非常让人讨厌,显示一张图片,也要带着灰白色的背景色,一张好好的png图片就这么不透明了. 用n多中网上的方式,差点成功的就还有这个了 _background: none; _filter: ...

  4. 处理IE6下PNG图片透明背景问题

    由于历史原因,IE较早的版本不支持PNG透明 可以支持GIF等的透明 由于png图片相对较小,所以很多网站还是青睐于PNG图片 最近就遇到这种情况,使用js和css滤镜来实现的与大家分享一下下: 首先 ...

  5. 解决IE6下不支持 png24的透明图片问题

    常用的两种解决方案: 第一:使用IE滤镜解决 关键代码: css代码  _background:none;_filter:progid:DXImageTransform.Microsoft.Alpha ...

  6. 解决全站ie6下PNG图片不透明问题只要几行代码

    解决全站ie6下PNG图片不透明问题只要复制下面这几行代码粘贴在你的文档最底部,需要用到的包DD_belatedPNG_0.0.8a.js自己网上下载吧 代码走起 /*在文档底部加入以下代码*/ &l ...

  7. 解决IE6下浮动层固定定位的经典方法

    <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title> ...

  8. jquery返回顶部和底部插件和解决ie6下fixed插件

    (function($){ //返回顶部和底部插件 $.fn.extend({ goTopBootom:function (options){ //默认参数 var defaults = { &quo ...

  9. 解决IE6下PNG透明的JS插件:DD_belatedPNG.js

    DD_belatedPNG是一款解决IE6下PNG透明的JS插件,支持background-position和background-repeat属性,支持伪类.使用方法: <!--[if lte ...

随机推荐

  1. 程序员的自我修养:高效使用Google解决问题

    如果票选近二十年最伟大的发明,我相信搜索引擎肯定会占据一个不容小觑的位置,它不单是一项发明,更是一项成就,最大程度消灭了信息的不平等.既然人人都可以接触到海量的信息,那么衡量信息财富多寡就只剩下技巧这 ...

  2. Git基础教程(一)

    本教程为学习笔记,github作为最受欢迎的资源库,不可不学!详细教程参见:廖雪峰的官方网站Git教程系列.准备花两篇幅搞定实战总结,闲言碎语少说,脚踏实地求真! 1,Git入门       Git是 ...

  3. Java I/O之NIO概念理解

    JDK1.4的java.nio.*包引入了新的Java I/O新类库,其目的在于提高速度.实际上,旧的I/O包已经使用nio重新实现过,以便充分利用这种速度提高,因此即使我们不显式地用nio编码,也能 ...

  4. ThinkPhp知识大全(非常详细)

    php框架 一.真实项目开发步骤: 多人同时开发项目,协作开发项目.分工合理.效率有提高(代码风格不一样.分工不好) 测试阶段 上线运行 对项目进行维护.修改.升级(单个人维护项目,十分困难,代码风格 ...

  5. Linux部署与基本指令

    把以前写的linux发布一下下吧,写的真的好差劲... Linux部署   chmod:改变一个文件的权限 改变abc的权限为777 常用的权限: 777-644-755 ************** ...

  6. vue关于class和样式的使用

    这篇文章主要为大家详细介绍了Vue.js的Class与样式绑定,具有一定的参考价值,感兴趣的小伙伴们可以参考一下 数据绑定一个常见需求是操作元素的 class 列表和它的内联样式.因为它们都是 att ...

  7. require和include的区别及自动加载的定义

    //引入文件//require与include的区别://include主要是指引入,如果引入的文件出现错误,则程序停止运行//require主要是指请求,如果请求的文件出现错误,则程序不受影响,继续 ...

  8. C++ Primer 5 CH1 开始

    1.1 编写一个简单的C++程序 在大多数系统中,main 的返回值被用来指示状态.返回值 0 表示成功,非 0 的返回值的含义由系统定义,通常用来指出错误类型. 访问 main 的返回值的方法依赖于 ...

  9. RecyclerView 设置item间隔的方法

    RecyclerView大家常用,但是如何给加载出来的item增加间隔很多人都不知道,下面是方法,直接上代码了: LinearLayoutManager layoutManager = new Lin ...

  10. Spring Data JPA 实例查询

    一.相关接口方法     在继承JpaRepository接口后,自动拥有了按"实例"进行查询的诸多方法.这些方法主要在两个接口中定义,一是QueryByExampleExecut ...