方法一：
直接加入下面的javascript
程序代码
| function correctPNG() { for(var i=0; i { var img = document.images[i] var imgName = img.src.toUpperCase() if (imgName.substring(imgName.length-3, imgName.length) == "PNG") { var imgID = (img.id) ? "id='" + img.id + "' " : "" var imgClass = (img.className) ? "class='" + img.className + "' " : "" var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' " var imgStyle = "display:inline-block;" + img.style.cssText if (img.align == "left") imgStyle = "float:left;" + imgStyle if (img.align == "right") imgStyle = "float:right;" + imgStyle if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle var strNewHTML = " + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src=\'" + img.src + "\', sizingMethod='scale');\">" img.outerHTML = strNewHTML i = i-1 } } } window.attachEvent("onload", correctPNG); if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) { window.attachEvent("onload", alphaBackgrounds); } function alphaBackgrounds(){ var rslt = navigator.appVersion.match(/MSIE (d+.d+)/, ''); var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5); for (i=0; i var bg = document.all[i].currentStyle.backgroundImage; if (itsAllGood && bg){ if (bg.match(/.png/i) != null){ var mypng = bg.substring(5,bg.length-2); document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='scale')"; document.all[i].style.backgroundImage = "url('')"; } } } } alphaBackgrounds(); |
1.为PNG格式的图片建立一个完全相同的gif格式，在编码里面使用gif图片
2.利用IE支持DXImageTransform.Microsoft.AlphaImageLoader滤镜来使用PNG格式转换gif为png图片，并将png图片作为背景显示，首先检测浏览器，接下来判断class为png的元素，完成替换.
