function submenu(obj){
	if(document.all){
		UL = obj.getElementsByTagName('ul');
		if(UL.length > 0){
		  d = UL[0].style;
		  d.display = (d.display == 'none' || d.display == '') ? 'block' : 'none';
			LI = obj.getElementsByTagName('li');
			nLI = LI.length;
			for(i=0; i < nLI; i++){
				LI[i].onmouseover = function(){
					submenu(this);
				}
				LI[i].onmouseout = function(){
					submenu(this);
				}
			}
		}
	}
}