function initMenu() {
	mtd=document.getElementById('menu').getElementsByTagName('td');
	for(i=0;i<mtd.length;i++) {
		mtd[i].onmouseover=function() {
			this.style.background='url(/i/ma.png) no-repeat 50% 0';
			this.getElementsByTagName('div')[0].style.display='block';
		}
		mtd[i].onmouseout=function() {
			this.style.background='none';
			this.getElementsByTagName('div')[0].style.display='none';
		}
	}
}