//Menu elements selection
lastID = "";
function tabChange() {

	document.getElementById("frame1").style.background ="#73937D";	
	spatial("world");
}
function m1Click(obj, num) {
	document.getElementById(obj.id).style.background = "#73937D"; // onclick
	
	if (lastID != obj.id && lastID != "") {
		document.getElementById(lastID).style.background = "none"; // colour back to default	
	}
	if (lastID == "") {
		document.getElementById("frame1").style.background = "none"; // onclick
	}
	lastID = obj.id;
	if (obj.id != "frame1") {
		document.getElementById("frame1").style.background = "none";
	}
}	
// -->
var bw = new lib_bwcheck();
function lib_bwcheck() {
	this.ver = navigator.appVersion;
		//this.vender = navigator.vender;
	this.product = navigator.product;
	this.moz = navigator.product == "Gecko";
	this.agent = navigator.userAgent;
	this.dom = document.getElementById ? 1 : 0;
	this.mac = this.agent.indexOf("Mac") > -1;
	this.opera5 = window.opera ? 1 : 0;
	this.ie5 = (this.ver.indexOf("MSIE 5") > -1 && this.dom && !this.opera5) ? 1 : 0;
	this.ie6 = (this.ver.indexOf("MSIE 6") > -1 && this.dom && !this.opera5) ? 1 : 0;
	this.ie7 = (this.ver.indexOf("MSIE 7") > -1 && this.dom && !this.opera5) ? 1 : 0;
	this.ie5mac = (this.ver.indexOf("MSIE 5.23") > -1 && !this.opera5 && this.mac) ? 1 : 0;
	this.ie4 = (document.all && !this.dom && !this.opera5) ? 1 : 0;
	this.ie = this.ie4 || this.ie5 || this.ie6 || this.ie7;
	this.saf = this.agent.indexOf("Safari") > -1;
	this.ns6 = (this.dom && parseInt(this.ver) >= 5) ? 1 : 0;
	this.ns4 = (document.layers && !this.dom) ? 1 : 0;
	this.bw = (this.moz || this.ie5mac || this.saf || this.ie7 || this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5);
	return this;
}