function my_show_div(itm){
	if (!itm)
		return;
	itm.style.display="";
}
function my_hide_div(itm){
	if (!itm)
		return;
	itm.style.display="none";
}
function my_getbyid(id){
	itm=null;
	if (document.getElementById){
		itm=document.getElementById(id);
	}else if(document.all){
		itm=document.all[id];
	}else if(document.layers){
		itm=document.layers[id];
	}
	return itm;
}
function ShowMenu(num,qm){
	if (num) {
		for (var i=1;i<=qm;i++) {
			id="menu"+i;
			itm=my_getbyid(id);
			if (i==num)
				my_show_div(itm);
			else
				my_hide_div(itm);
		}
	}
}