function fixPNG(el) {
	try {
		if (window.ie6){
			el = $(el);
			if (!el) return el;
			if (el.getTag() == "img" && el.getProperty('src').test(".png")) {
				var vis = el.isVisible();
				try { //safari sometimes crashes here, so catch it
					dim = el.getSize();
				}catch(e){}
				if(!vis){
					var before = {};
					//use this method instead of getStyles 
					['visibility', 'display', 'position'].each(function(style){
						before[style] = this.style[style]||'';
					}, this);
					//this.getStyles('visibility', 'display', 'position');
					this.setStyles({
						visibility: 'hidden',
						display: 'block',
						position:'absolute'
					});
					dim = el.getSize(); //works now, because the display isn't none
					this.setStyles(before); //put it back where it was
					el.hide();
				}
				var replacement = new Element('span', {
					id:(el.id)?el.id:'',
					'class':(el.className)?el.className:'',
					title:(el.title)?el.title:(el.alt)?el.alt:'',
					styles: {
						display: vis?'inline-block':'none',
						width: dim.size.x+'px',
						height: dim.size.y+'px',
						filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader (src='" 
							+ el.src + "', sizingMethod='scale');"
					},
					src: el.src
				});
				if(el.style.cssText) {
					try {
						var styles = {};
						var s = el.style.cssText.split(';');
						s.each(function(style){
							var n = style.split(':');
							styles[n[0]] = n[1];
						});
						replacement.setStyle(styles);
					} catch(e){ dbug.log('fixPNG1: ', e)}
				}
				if(replacement.cloneEvents) replacement.cloneEvents(el);
				el.replaceWith(replacement);
			} else if (el.getTag() != "img") {
			 	var imgURL = el.getStyle('background-image');
			 	if (imgURL.test(/\((.+)\)/)){
			 		imgURL = imgURL.replace('png', 'gif');
			 		el.setStyle('background-image', imgURL);
			 	};
			}
		}
	} catch(e) {console.log('fixPNG2: ', e)}
};

if(window.ie6) 
	window.addEvent('domready', function(){ 
		fixPNG('navigation');
	});