var path= contextPath+"/applications/webwork/site_"+installationId+"/media/";
var blank=path+"spacer.gif"

function fnLoadPngs() {
	var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
	var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);

	for (var i = document.images.length - 1, img = null; (img = document.images[i]); i--) {
		if (itsAllGood && img.src.match(/\.png$/i) != null) {
      img.style.visibility = "hidden";
      fnFixPng(img);
			img.attachEvent("onpropertychange", fnPropertyChanged);
    }
    img.style.visibility = "visible";
	}

	var nl = document.getElementsByTagName("INPUT");
	for (var i = nl.length - 1, e = null; (e = nl[i]); i--) {
		if (e.className && e.className.match(/\bimage\b/i) != null) {
			if (e.src.match(/\.png$/i) != null) {
        e.style.visibility = "hidden";
        fnFixPng(e);
				e.attachEvent("onpropertychange", fnPropertyChanged);
			}
		}
    e.style.visibility = "visible";
  }
}

function fnPropertyChanged() {
	if (window.event.propertyName == "src") {
		var el = window.event.srcElement;
		if (!el.src.match(/spacer\.gif$/i)) {
			el.filters.item(0).src = el.src;
			el.src = blank;
		}
	}
}

function dbg(o) {
	var s = "";
	var i = 0;
	for (var p in o) {
		s += p + ": " + o[p] + "\n";
		if (++i % 10 == 0) {
			alert(s);
			s = "";
		}
	}
	alert(s);
}

function fnFixPng(img) {

  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='scale')"
	img.src = blank;
}


  if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
    document.writeln('<style type="text/css">img, input.image { visibility:hidden; } </style>');
    window.attachEvent("onload", fnLoadPngs);
}