function isEmailAddress(theElement) {
	var s = theElement.value;
	var filter=/^[A-Za-z][A-Za-z0-9_]*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
	
	if (s.length == 0 ) return true;
	
	if (filter.test(s))	return true;
	else return false;

	return false;
};