flag = new Array();
function tree(menu){
    tree_list = document.all.item("tree");
    if(flag[menu] == 1){
        tree_list[menu].style.display='none';
        flag[menu] = 0;
    }
    else{
        tree_list[menu].style.display='block';
        flag[menu] = 1;
    }
}

function Supported()
{
  if(navigator.appName=="Microsoft Internet Explorer")
  {
    return(1);
  }
  return(0);
}


if(Supported())
{
  document.write(
     '<STYLE type=text/css>'+
     '.tree {display:none;}'+
     '}'+
     '</STYLE>'
    );
}