function observeAtagInDivID(divid){
	elements = $$('#'+divid+' a');
	actelement = $$('#'+divid+' a.act');
	var actItem;
	var actItemBG;
	actelement.each(function(itemact){
		actItem = itemact;
		actItemBG = itemact.getStyle('backgroundImage');				
	});
	if(actItem){
		elements.each(function(item){
			if(!item.hasClassName('act')){
				item.observe('mouseover',function(event){
					actItem.setStyle({
						backgroundImage: 'none'
					});	
				});
				item.observe('mouseout',function(event){
					actItem.setStyle({
						backgroundImage: actItemBG
					});	
				});
			}
		});
	}
}