var isWin, isMac, isIE, isIE4, isIE5, isNav, isNav6, isOld

function browserCheck() {
	isWin = (navigator.platform.indexOf('Win')!=-1) ? true:false
	isMac = (navigator.platform.indexOf('Mac')!=-1) ? true:false

	isIE4 = (document.all && !document.getElementById) ? true:false
	isIE5 = (document.all && document.getElementById) ? true:false
 	isIE = (isIE4 || isIE5) ? true:false

	isNav = (document.layers) ? true:false
	isNav6 = (!document.all && document.getElementById) ? true:false

	if(isNav6){
		document.all=document.getElementsByTagName("*");
	}

	isOld = (parseInt(navigator.appVersion) < 4) ? true:false

	var useragent = navigator.userAgent;
	var bName = navigator.appName;
	var pos = useragent.indexOf('MSIE');
	if (pos > -1) {
		bVer = useragent.substring(pos + 5);
		var pos = bVer.indexOf(';');
		var bVer = bVer.substring(0,pos);
	}

	if (bName == "Netscape") {
		var bVer = useragent.substring(8);
		var pos = bVer.indexOf(' ');
		var bVer = bVer.substring(0, pos);
	}

	if (bName == "Netscape" && parseInt(navigator.appVersion) >= 5) {
		var pos = useragent.lastIndexOf('/');
		var bVer = useragent.substring(pos + 1);
		isNav6 = true;
	}
}

browserCheck();

function RolloverImage(w, h, on_src, off_src) {
	this.on = new Image(w, h);
	this.on.src = on_src;
	this.off = new Image(w, h);
	this.off.src = off_src;
}

function setStatus(messageString) {
	window.status = messageString;
}