var timer;
var isMenuOn = false;
var lastMenuId = "";

function menuOn(aMenuId)
{
  // hide any visible menu
  //alert("menuOn " + aMenuId);
  if (isMenuOn && (lastMenuId!="") && (lastMenuId!=aMenuId))
  {
	setMenu(lastMenuId,false);
  }

  setMenu(aMenuId,true);
}

function menuOff()
{
  //alert("menuOff " + lastMenuId);
  if (isMenuOn && (lastMenuId!=""))
  {
	timer = setTimeout("setMenu('"+lastMenuId+"',false)",500);
  }
}

function setMenu(aMenuId,aVisible)
{
  clearInterval(timer);
 
  //alert("in set menu " + aMenuId + " " + aVisible);
  if (aVisible)
  { 
  	document.getElementById(aMenuId).style.display = "block"; 
	isMenuOn = true;
	lastMenuId = aMenuId;
	}
  else { 
  	document.getElementById(aMenuId).style.display = "none"; 
	isMenuOn = false;
	}
}

function keepMenuOn(aMenuId)
{
	if (lastMenuId==aMenuId)
	{
		setMenu(aMenuId,true);
	}
}

function menuPreload()
{
MM_preloadImages('images/nav01r_ABOUTALLOSTERA.gif','images/nav02r_TECHNOLOGY.gif','images/nav03r_PRODUCTS.gif','images/nav04r_PARTNERING-OPPORTUNI.gif','images/nav05r_NEWS-EVENTS.gif','images/nav06r_CAREERS.gif','images/nav07r_CONTACT.gif','images/nav2-0r_ABOUTALLOSTERA.gif','images/nav2-1r_HISTORY.gif','images/nav09r_HOME.gif','images/nav1-1r_HISTORY.gif','images/nav1-2r_MANAGEMENT.gif','images/nav1-3r_BOARD.gif','images/nav1-4r_SCIENTIFICADVISORY.gif','images/nav1-5r_CORPORATEPRES.gif','images/nav02-1r_MODULEX.gif','images/nav02-2r_ORALACTIVITY.gif','images/nav02-3r_ALLOSTERIC.gif','images/nav02-4r_PATENTS.gif','images/nav02-5r_PUBLICATIONS.gif','images/nav03-0r_PRODUCTPIPELINE.gif','images/nav03-1r_APG2305.gif','images/nav03-2r_APG10110.gif','images/nav05-1r_PRESSRELEASES.gif','images/nav05-2r_MEDIA.gif','images/nav05-3r_EVENTSPRES.gif')
//alert("preloaded images");
}