function display_submenu(div_id, myLocation) {
	
	var rand_no = Math.random();
	rand_no = rand_no * 100000;	
	
	var slideSpeed = 400;
	var openLocationSpeed = slideSpeed + 100;
	
  	if ($(div_id).is(":hidden")) {
  		$.get("/rpc/adjust_vertical_menu.php", {div_id: div_id, display: "show", random: rand_no});
   		$(div_id).slideDown(slideSpeed);
   		if (myLocation) {
   			var location = "location.href='"+myLocation+"'";
   			window.setTimeout(location, openLocationSpeed);
   		}
   	} else {
   		$.get("/rpc/adjust_vertical_menu.php", {div_id: div_id, display: "hide", random: rand_no});
  		$(div_id).slideUp(slideSpeed);
   	}
}