function parse_images() {

	function on_mouseout() {
		this.src = this.rootsrc;
	}
	

	function on_mouseover() {
		this.src = this.hoversrc;
	}	
	
	if (document.getElementById) {
		var ar = document.getElementsByTagName('img');
		for( var x = 0; ar[x]; x++ ) {
			var im = ar[x];
			if(im.getAttribute) im.hoversrc = im.getAttribute('hoversrc');
			if(im.hoversrc) {					
			
				im.rootsrc = im.src;				
				im.onmouseout = on_mouseout;
				
				if(!img_cache[im.hoversrc]) {
					img_cache[im.hoversrc] = new Image();
					img_cache[im.hoversrc].src = im.hoversrc;
				}
				
				im.onmouseover = on_mouseover;
				
			}
		}
	}		
}