// javascript document

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);
	//var itsallgood = ((rslt != null) && (number(rslt[1]) >= 5.5) && (number(rslt[1]) < 7) && (document.body.filters));
	for (i=0; i<document.all.length; i++){
		var bg = document.all[i].currentstyle.backgroundimage;
		if (bg){
			//兼容可信网站的附加内容判断
			if(document.all[i].id.indexof("knet_kx_verify")<0)
			{
				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);
}