function AddClass (currentClass, newClass)
{
	if (currentClass.length > 0)
	{
		return currentClass + ' ' + newClass;
	}
	else
	{
		return newClass;
	}
}

function RemoveClass (currentClass, newClass)
{
	var sReturn = '';
	
	if (currentClass.length > 0)
	{
		var ind = currentClass.indexOf(newClass);
		if (ind >= 0)
		{
			sReturn = currentClass.substring(0, ind - 1) + currentClass.substring(ind + newClass.length, currentClass.length);
		}
	}
	return sReturn;
}