menu_oid='none';
function change(id, newClass) {
identity=document.getElementById(id);
identity.className=newClass;
}
function show(id)
{
  document.getElementById(id).style.display = "block";
}
function hide(id)
{
  document.getElementById(id).style.display = "none";
}
function show_if(id)
{ 
  document.getElementById(id).style.display = "block";
  var agt=navigator.userAgent.toLowerCase();
  if (agt.indexOf("safari") != -1)
    setTimeout('hide_if(\''+id+'\')',3000);
  else
    setTimeout('hide_if(\''+id+'\')',300);
}
function hide_if(id)
{
  if(id != menu_oid)
    {
    document.getElementById(id).style.display = "none";
	}
}