ie4=document.all?1:0;

 if(ie4)

    {
    v_width="500";
    v_height="314";
    }
    
    else
    {
    v_width="495";
    v_height="314";
    }


function viewerpop()
 {
  window.open('timeline_index.html','timeline','location=no,toolbar=no,directories=no,menubar=no,resizable=no,scrollbars=auto,status=no,width='+v_width+',height='+v_height);
 }