function highlight(elm, val) 
{ 
 if(val != '') 
 { 
 var i;  
 for(i = 0; i < document.forms[0][elm].length; i++)
 { 
   if(document.forms[0][elm][i].value == val)
     break; 
 }
 
  document.forms[0][elm].selectedIndex = i
 }
}