function assignOver() {
	if(!$('more-boxes')) return;
	var ele = $('more-boxes').getElementsByTagName('IMG');
	for(var x=0; x<ele.length; x++) {
		ele[x].onmouseover = function() {
			this.className = this.className.concat(' over');
		}
		ele[x].onmouseout = function() {
			this.className = this.className.replace(/\bover\b/,'');
		}
	}
}
Event.observe(window, 'load', assignOver);