var inmenu = false;
var lastmenu = 0;

function Menu(current) {
   if (!document.getElementById) return;
   inmenu = true;
   oldmenu = lastmenu;
   lastmenu = current;
   if (oldmenu) Erase(oldmenu);
   mainmenu = document.getElementById("menu-" + current);
   mainmenu.style.backgroundColor = "#FFCC00";
   submenu = document.getElementById(current);
   submenu.style.visibility = "visible";
   box = document.getElementById(current + "-box");
   box.style.backgroundColor = "#FFCC00";
}

function Erase(current) {
   if (!document.getElementById) return;
   if (inmenu && lastmenu == current) {
	  return;
   }
   mainmenu = document.getElementById("menu-" + current);
   mainmenu.style.backgroundColor = "#FF6600";
   submenu = document.getElementById(current);
   submenu.style.visibility = "hidden";
}

function Timeout(current) {
   inmenu = false;
   window.setTimeout("Erase('" + current + "');",500);
}

function Highlight(menu, item) {
   if (!document.getElementById) return;
   inmenu = true;
   lastmenu = menu;
   obj = document.getElementById(item);
   obj.style.backgroundColor = "Silver";
}

function UnHighlight(menu, item) {
   if (!document.getElementById) return;
   Timeout(menu);
   obj = document.getElementById(item);
   obj.style.backgroundColor = "#FFCC00";
}