function onCourseChange(val)
{
   return false;
   for(var i =1; i <= 3; i++ )
  {
        document.getElementById("T"+i).className="bd_ny_Out"; 
        document.getElementById("T"+i+"D").style.display="none";
  }    
    val.className="bd_ny_Over";  
    document.getElementById(val.id +"D").style.display="block";
    
}