var numofitems = 4;

//menu constructor
function menu(allitems,thisitem){ //,startstate
  callname= "gl"+thisitem;
  divname="subglobal"+thisitem;  
  this.numberofmenuitems = 4;
  this.caller = document.getElementById(callname);
  this.thediv = document.getElementById(divname);
//  this.thediv.style.visibility = startstate;
}

function showmenu(id){
  for (var i=1; i<= numofitems; i++){
	document.getElementById("subglobal"+i).style.display="none";
  }	
  document.getElementById("subglobal"+id).style.display="block";
}

function closesubnav(){
	for (var i=1; i<= numofitems; i++){
	  document.getElementById("subglobal"+i).style.display="none";
	}
}