var imgOn, imgOff;
// var refreshcount=0;
// var initcount=0;
var version="veryplain";
var homeOn;
var ready=false;

function init() {
	GetVersion();
//	initcount=initcount+1;
/**********************
	if (typeof(homeOn)=="undefined")  { 
		homeOff=new Image(120,56);	homeOff.src="gif/home.gif";
		homeOn= new Image(120,56);	homeOn.src= "gif/homeon.gif";
		submitOff=new Image(120,56);	submitOff.src="gif/submit.gif";
		submitOn= new Image(120,56);	submitOn.src= "gif/submiton.gif";
		srchlpOff=new Image(120,56);	srchlpOff.src="gif/srchlp.gif";
		srchlpOn= new Image(120,56);	srchlpOn.src= "gif/srchlpon.gif";
		// different version of the script required for each directory level w.r.t. /gif
	}
**********************/
	ready=true;

	menuX =	 5;	// pixels right
	menuY =	10;	// pixels down
	RefrT =	20;	// milliseconds
	setInterval ("MenuRefresh()",RefrT);
	Xflash="green";
	Xdark="black";
}

function GetVersion() {
	vernum=navigator.appVersion.charAt(0);
	if (vernum >= "4") {
		if (navigator.appName == "Microsoft Internet Explorer") {
			if (navigator.appVersion.indexOf("5") >> 1) {
				version="IE5"
			}
			else {
				version="veryplain"
			}
		}
		else if (navigator.appName=="Netscape" && vernum=="4") {
			version="Nav4" 
		}
		else {
			version="ECMA"
		}
	}
	if (version=="ECMA") {
		if (typeof(document.getElementById("navbar").style)=="undefined") {
			version="nostyle" 
		}
	}
	else if (version=="Nav4") {
		if (typeof(document.navbar)=="undefined") {
			version="nostyle" 
		}
	}
	else if (version=="IE5") {
		if (typeof(document.all.navbar.style)=="undefined") {
			version="nostyle" /* can this happen? */
		}
	}	
//	self.window.status="ver: "+version+": '"+ navigator.appName + "/"+ navigator.appVersion;
}

function advance(thingy) {
/* * * lots of reading on DOM to do before this works
	if (ready) {
		if (version == "ECMA") { 
   document.getElementById("thingy").style.background-color = Xflash 
		}
		else if (version == "Nav4") { 
   document.navbar.document.style[thingy].background-color=Xflash 
		}
		else if (version == "IE5") {
   document.all[thingy].style.background-color = Xflash
		}
	}
*/
}


function retreat(thingy) {
/*
	if (ready) {
		if (version == "ECMA") { 
			document.getElementById("thingy").background-color=Xdark
		}
		else if (version == "Nav4") { 
			document.navbar.document.style[thingy].background-color=Xdark 
		}
		else if (version == "IE5") {
			document.style[thingy].background-color=Xdark
		}
	}
*/
}

function MenuRefresh() {
	if (version=="ECMA") {
		with (document.getElementById("navbar").style) {
			left	= menuX + pageXOffset;
			top	= menuY + pageYOffset;
		}
	}
	else if (version=="Nav4") {
		with (document.navbar) {
			left	= menuX + pageXOffset;
			top	= menuY + pageYOffset;
		}
	}
	else if (version=="IE5") {
		with (document.all.navbar.style) {
			left	= menuX + document.body.scrollLeft;
			top	= menuY + document.body.scrollTop;
		}
	}
//	refreshcount=refreshcount+1;
//	self.window.status=refreshcount;
}

//end of script