ie6下 png作为前景和背景透明

前景图片时,用js

    <script language="JavaScript" type="text/JavaScript">
        <!--
        // flashlover
        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
                }
            }
        }
        window.attachEvent("onload", correctPNG);
        //-->
    </script>

 

 作为背景时ie下用css解决：

  background: url("../../booking/images/logo_bg.png") 
    _background-image:url(../../booking/images/logo_bg.png);
   _background: none transparent scroll repeat 0% 0%;
 _FILTER:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../../booking/images/logo_bg.png',sizingMethod='scale');