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