var isCSS = (document.images && document.body && document.body.style) ? true : false;

function getObject(obj) {
	if (typeof obj == "string" && isCSS)
		obj = document.getElementById(obj);
	if (obj && isCSS)
		obj = obj.style;
	return obj;
}

function shiftTo(obj, x, y) {
	obj = getObject(obj);
	if (obj && isCSS) {
		var units = (typeof obj.left == "string") ? "px" : 0;
		obj.left = x + units;
		obj.top = y + units;
	}
}

function show(obj) {
	obj = getObject(obj);
	if (obj)
		obj.visibility = "visible";
}

function hide(obj) {
	obj = getObject(obj);
	if (obj)
		obj.visibility = "hidden";
}