一段简单的js让png24兼容ie6，单张图片有效

<span class="gurl"><img src="images/port1_1.png" width="273" height="88" alt=""/></span>

.gurl{display:block;}
.gurl img{_display:none;}

$(".gurl").each(function(){
var $width=$(this).find("img").width();
var $height=$(this).find("img").height();
var $src=$(this).find("img").attr("src");

var $filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src="+ $src +",sizingMethod='crop')";
$(this).css({width:$width,height:$height,filter:$filter});
});