NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
DOM = (document.getElementById) ? 1 : 0;

function hide(obj) {
	if (NS4) document.layers[obj].visibility = "hide";
	if (IE4) document.all[obj].style.visibility = "hidden";
	if (DOM) document.getElementById(obj).style.visibility = "hidden";
}

function show(obj) {
	if (NS4) document.layers[obj].visibility = "show";
	if (IE4) document.all[obj].style.visibility = "visible";
	if (DOM) document.getElementById(obj).style.visibility = "visible";
}

function changeImages() {
	if(document.images) {
		for(var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function preloadMenu() {
	if (document.images) {
	}
}

function loadFrame(frame1,url1) {
	eval("parent." + frame1 + ".location='" + url1 + "'");
}