// simple email validation from w3schools.com

function validate_email(value,alerttxt)
{
	valid = value!=null && value!="" && (value.indexOf("\"") == -1);
	if(valid){		
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) 
		  {alert(alerttxt);valid= false;}
		else {valid= true;}
	}
	return valid;
}

function getDefaultEmailError(email)
{
	return '\"' + email + '\" is an invalid email. Please try again.';
}