if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
			window.attachEvent("onload", enableAlphaImages);
		}
		

		// 修复 IE 下 PNG 图片不能透明显示的问题
		function enableAlphaImages(){
			
			var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
			var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
			if (itsAllGood) {
				for (var i=0; i<document.all.length; i++){
					
					var obj = document.all[i];
					var bg = obj.currentStyle.backgroundImage;
					var img = document.images[i];
					if (bg && bg.match(/\.png/i) != null) {
						var img = bg.substring(5,bg.length-2);
						var offset = obj.style["background-position"];
						obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+img+"', sizingMethod='crop')";
						obj.style.backgroundImage = "url('"+domain+"/script/spacer.gif')";
						obj.style["background-position"] = offset; // reapply
					} else if (img && img.src.match(/\.png$/i) != null) {
						var src = img.src;
						img.style.width = img.width + "px";
						img.style.height = img.height + "px";
						img.style.filter ="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizingMethod='crop')"
						img.src = domain+"/script/spacer.gif";
					}
				}
			}
			
		}