window.addEvent('domready', function() {
	$('portal').getElements('td a').each(function(e){
		
		e.addEvent('mouseover', function(e) {
			this.firstChild.src = this.firstChild.src.substr(0,this.firstChild.src.indexOf(".jpg")) + "_hover.jpg";
		});
		
		e.addEvent('mouseout', function(e) {
			this.firstChild.src = this.firstChild.src.substr(0,this.firstChild.src.indexOf("_hover.jpg")) + ".jpg";
		});
		
	});
});