function addEvent(elementObject, eventName, functionObject)
{
  if(elementObject.addEventListener)
    elementObject.addEventListener(eventName, functionObject, false);
  else
    if(document.attachEvent)
       elementObject.attachEvent("on" + eventName, functionObject);
}
	
function primeMail(mailid)
{
  var ef = $(mailid);

  if (ef)
    {
      ef.value = 'your.email@example.com';

      ef.needsClear = true;

      var clearFunc = function() { 
	if (ef.needsClear) 
	{
	  ef.value = ''; 
	  ef.needsClear = false;
        }
      };

      addEvent(ef, 'focus', clearFunc);
      addEvent(ef, 'click', clearFunc);
    }
}