// Original code (youngpup’s Sleight): http://youngpup.net/2001/sleight
// Updated by Drew McLellan at http://www.allinthehead.com/retro/69
// namespace and onload event added by zigotica.com
var OPACITIES = {
	addLoadEvent : function (fn) {
		var old = window.onload;
		if (typeof window.onload != 'function') {
			window.onload = fn;
		} else {
			window.onload = function() {
				old();
				fn();
			}
		}
	},

	alphaBackgrounds : function() {
		var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
		var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
		if (itsAllGood) {
			for (i=0; i<document.all.length; i++) {
				var bg = document.all[i].currentStyle.backgroundImage;
				if (bg.match(/\.png/i) != null) {
					var mypng = bg.substring(5,bg.length-2);
					document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='crop')";
					document.all[i].style.backgroundImage = "url('')"; //doesn't exist?*/
				}
			}
		}
	}
	
}

if (document.getElementById && document.getElementsByTagName && navigator.appVersion.indexOf("MSIE") > -1 && !window.opera) {
	OPACITIES.addLoadEvent(function(){OPACITIES.alphaBackgrounds();})
}