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://dielectricsciences.thomasnet-navigator.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;  
 }    
}