// SubMenu Operation
var submenuin = "";
var submenutime = 100;
function showSubMenu(menuID)
{
   submenuin = menuID;
   document.getElementById(menuID).style.display = "block";
   document.getElementById(menuID).style.zIndex = 5;
}
function hideSubMenu(menuID)
{
   document.getElementById(menuID).style.zIndex = 4;
   setTimeout("doHideSubMenu('" + menuID + "')",submenutime);
   submenuin = "";
}
function doHideSubMenu(menuID)
{
   if(submenuin != menuID)
      document.getElementById(menuID).style.display = "none";
}
function getTopNode(linkElem)
{
   tn = "";
   le = linkElem;
   while (tn != "TABLE")
   {
      le = le.parentNode;
	  tn = le.tagName;
   }
   return le.id;
}