function getObjectHeight(obj)
{
	if (obj.offsetHeight)
	{
		return obj.offsetHeight;
	}
	return 0;
}

function getObjectWidth(obj)
{
	if (obj.offsetWidth)
	{
		return obj.offsetWidth;
	}
	return 0;
}

function changeObjectClass(obj_id, class_name)
{
	var target;
	if (document.all) {
		target = document.all[obj_id];
	}
	else {
		target = document.getElementById(obj_id);
	}
	target.className = class_name;
}