var img_plus  = "images/plus.gif"; 
var img_minus = "images/minus.gif";

function ExpandCollapce(id) 
{
 obj  = document.getElementById(id);
 obj1 = document.getElementById('img'+id);
 if (obj.style.display == "none") 
   {
    obj.style.display = "block";
    obj1.src = img_minus;
   }
 else
   {
    obj.style.display = "none";
    obj1.src = img_plus;
   }
}

function InitMenu() 
{
 var i = 1;
 do 
   {
    obj = document.getElementById(i);
    if (obj) 
      {
       obj.style.display = "none";
      }
    i++;
   } while (obj);
}