1.用png图片做背景时,在IE6下会有灰底。飞飞Asp技,术乐园 解决方法:是为png加滤镜去除背景,具体代码如下:
function correctPNG() { for(var i=0; i<document.images.length; 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 = "<span " + imgID + imgClass + imgTitle + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" img.outerHTML = strNewHTML i = i-1 } } } function alphaBackgrounds(){ var rslt = navigator.appVersion.match(/MSIE (d+.d+)/, ''); var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5); for (i=0; i<document.all.length; i++){ var bg = document.all[i].currentStyle.backgroundImage; if (bg){ if (bg.match(/.png/i) != null){ var mypng = bg.substring(5,bg.length-2); //alert(mypng); document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='crop')"; document.all[i].style.backgroundImage = "url('')"; //alert(document.all[i].style.filter); } } } } if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) { window.attachEvent("onload", correctPNG); window.attachEvent("onload", alphaBackgrounds); }
使用方法:把以上代码另存为单独得JS文件,在页面里调用就可以了。 2.JS解决了png背景的灰底后,可能会造成以png做背景的链接失效 解决方法:在a标签上加position:relative; 3.切记a:link,a:visited,a:hover,a:active的顺序,顺序不对有可能效果失效。记忆方法:love & hate 4.在背景图片上做热区。实现方法是a标签嵌套div,然后css规定div的大小和位置。 结构如下:<a><div style="xxxxxxx"> </div></a>
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