var header = document.getElementById("header");
if (header)
{
  var As = header.getElementsByTagName('a');
  if (As.length > 0)
  {
    for(var i=0; i<As.length; i++)
    {
      var a = As[i];
          a.onmouseover = function(){
            var sub_navigation = document.getElementById("sub_navigation");
            if (sub_navigation)
            {
              var ULs = sub_navigation.getElementsByTagName('ul');

              for(var j=0; j<ULs.length; j++)
              {
                var ul = ULs[j];
                    ul.style.display = 'none';
              }

              var id = this.id;
              var child_navigation = document.getElementById(id+"-child-id");

              if (child_navigation)
              {
                jQuery("#"+id+"-child-id").show('fold', '', 1000);
              }
            }
          };
    }
  }
}