// JavaScript Document
function addListener(element,e,fn){    
   if(element.addEventListener){    
		element.addEventListener(e,fn,false);    
        } else {    
         element.attachEvent("on" + e,fn);    
        }    
   }
var myinput = document.getElementById("KW");
   addListener(myinput,"click",function(){
    myinput.value = "";
   })