function ctlSearch_OnClick () 
{ 
 var url; 
 var theform = document.frmSearchBox; 
  
 if (theform.keyword.value.length < 2) 
 { 
  alert('Please enter at least two characters.'); 
  theform.keyword.focus(); 
 } 
 else 
 { 
 var iIndex = theform.ddlSearchType.selectedIndex; 
 var sSearchType = theform.ddlSearchType.options[iIndex].value; 

  url = "http://dwinc.thomasnet.com/keyword/?&plpver=10&key=all&keycateg=100" 
  url = url + "&SchType=" + sSearchType; 
  url = url + "&keyword=" + encodeURI(theform.keyword.value); 
  url = url + "&refer=" + encodeURI("http://" + document.location.hostname); 
    
  document.location.href = url; 
 }   
}