/**
 * Created by JetBrains PhpStorm.
 * User: Maciej Kwiatkowski (Kodzitsu)
 * Date: 30.06.11
 * Time: 12:56
 */
function empty(variable)
{
	if (typeof(variable) == "undefined" || typeof(variable) == undefined) return true;
	else
	{
		if (variable == false || variable == null || variable == "" || variable.length < 1) return true;
	}
	return false;
}

function xor()
{
	var b = false;
	for (var j = 0; j < arguments.length; j++)
	{
		if (arguments[j] && ! b) b = true;
		else if (arguments[j] && b) return false;
	}
	return b;
};