function isValidEmail(strEmail){
	  validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
	  strEmail = document.forms[0].email.value;
	    if (strEmail.search(validRegExp) == -1) 
	   {
	      alert('A valid e-mail address is required. Please retry.');
	      return false;
	    } 
	    return true; 
	}