var MENU_p = new Array();

window.onload = function() {
	var d=document;
	if(d.getElementById('mainmenu')) {
		e=d.getElementById('mainmenu').getElementsByTagName('img');
		for(var i=0; i<e.length; i++)
		{
			MENU_p[e[i].id] = new Image;
			MENU_p[e[i].id].src = e[i].src.replace('.gif','a.gif');

			if(e[i].src.indexOf('a.gif',0)==-1) {
 
			e[i].onmouseover = function(event) {
				event = event || window.event;
				el = event.target || event.srcElement
				el.src = MENU_p[el.id].src;
			}
			e[i].onmouseout = function(event) {
				event = event || window.event;
				el = event.target || event.srcElement
				el.src = el.src.replace('a.gif','.gif');
			}

			}
		}
	}
}