function validateEmail(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   if(reg.test(email)== false) 
      return false;
   return true;
}

function firstFocusClear(obj)
{
	if (!jQuery(obj).hasClass('cleared_123'))
	{
		jQuery(obj).addClass('cleared_123');
		jQuery(obj).val('');
	}
}