function changeOpenmenu(id,head){ 

document.cookie = "navpos=" + id;

all_uls = document.getElementsByTagName("ul");
 
for(i=0;i<all_uls.length;i++)
{ 
  if (all_uls[i].className == "sub") 
  {
    all_uls[i].style.display = 'none';
  } 
}

all_uis = document.getElementsByTagName("li");
 
for(i=0;i<all_uis.length;i++){
  if (all_uis[i].className == "header") 
  {
   // all_uis[i].style.backgroundImage = url('site/images/submenu-off.gif')";
  } 
}
 
the_li = document.getElementById(head);
the_li.style.backgroundImage = "url('site/images/submenu-on.gif')";

the_ul = document.getElementById(id);
the_ul.style.display = 'block'; 
//clearButtons(); 
} 

function clearButtons() 
{ 
  if (!document.getElementsByTagName) 
    return; 
  
  var anchors = document.getElementsByTagName("a"); 
  for (var i=0; i<anchors.length; i++) 
  { 
    var anchor = anchors[i]; 
    anchor.blur(); 
  } 
}