var CurrentIndex = -1;


function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
  return "";
}

var group_id = getQueryVariable('group_id');

if(group_id != "")
{
	CurrentIndex = group_id;
}

function ExpandSubMenu(recordcount, MenuID)
{
  var j = 0
  objSub = document.getElementById("sub_"+MenuID);
  
  
  if (CurrentIndex == MenuID) //Expand or collapse same submenu?
        {
           if (objSub.className == "ExpandMenu")
                { objSub.className = "CollapseMenu";}
           else
                { objSub.className = "ExpandMenu";}
         }
   else        
   {
            /*
            if (CurrentIndex != -1)  // All submenus are collapsed if CurrentIndex = -1
            { 
				document.getElementById("sub_"+CurrentIndex).className = "CollapseMenu"; 
			}
			*/
			
			//all submenus should collapse
			for (j = 1; j < recordcount+1; j ++)
			{
			      document.getElementById("sub_"+j).className = "CollapseMenu";
			}      
            objSub.className = "ExpandMenu";
            CurrentIndex = MenuID;
   }
 }