function validateRequired(id, message, acceptsDefault)
{
	var element = document.getElementById(id);
	if((element.value == "") || ((!acceptsDefault) && (element.value == element.defaultValue)))
	{
		alert(message);
		element.focus();
		return false;
	}
	return true;
}

function validateRegularExpression(id, regExp, message)
{
	var element = document.getElementById(id);
	if(!element.value.match(regExp))
	{
		alert(message);
		element.focus();
		return false;
	}
	return true;
}

function validateEquality(id1, id2, message)
{
	var element1 = document.getElementById(id1);
	var element2 = document.getElementById(id2);
	if(element1.value != element2.value)
	{
		alert(message);
		element2.focus();
		return false;
	}
	return true;
}