//To Clear The Text on Focus
 function doClear(theText) 
{
     if (theText.value == theText.defaultValue)
 {
         theText.value = ""
     }
 }
//To Handle Clik On Press Enter 
function clickButton(e, buttonid)
{
  var evt = e ? e : window.event;
  var bt = document.getElementById(buttonid);
  if (bt)
  { 
      if (evt.keyCode == 13)
      { 
           bt.click(); 
           return false; 
      } 
 } 
}