function win(url){
	window.open(url,'newwin','toolbar=no,width=200,height=110'); 
}

function searchWindow()
        {
                var swind = window.open('http://www.ilabdatabase.com/php/searchform.php3?custnr=&membernr=855&source=&lang=', 'swind', 'resizable,dependant,scrollbars,titlebar=no,HEIGHT=400,WIDTH=600');
}

function buyWindow()
        {

                var bwind = window.open('http://www.nigelwilliams.com/buy.html', 'bwind', 'resizable,dependant,scrollbars,status,titlebar=no,HEIGHT=400,WIDTH=700');
	
}

//detect browser
bname = navigator.appName;
bver = parseInt (navigator.appVersion);

if (
	(bname == "Netscape" && bver>=3)
	|| (bname == "Microsoft Internet Explorer" && bver>=4)
	) br="n3";
else br="n2";

//preload images if browser capable
if (br=="n3"){
		homeon = new Image ();
		homeon.src = "images/nav/homeon.gif";
		helpon = new Image ();
		helpon.src = "images/nav/helpon.gif";
		searchon = new Image ();
		searchon.src = "images/nav/searchon.gif";
		abouton = new Image ();
		abouton.src = "images/nav/abouton.gif";
		contacton = new Image ();
		contacton.src = "images/nav/contacton.gif";
		buyon = new Image ();
		buyon.src = "images/nav/buyon.gif";

		homeoff = new Image ();
		homeoff.src = "images/nav/homeoff.gif";
		helpoff = new Image ();
		helpoff.src = "images/nav/helpoff.gif";
		searchoff = new Image ();
		searchoff.src = "images/nav/searchoff.gif";
		aboutoff = new Image ();
		aboutoff.src = "images/nav/aboutoff.gif";
		contactoff = new Image ();
		contactoff.src = "images/nav/contactoff.gif";
		buyoff = new Image ();
		buyoff.src = "images/nav/buyoff.gif";

		hometxt = new Image ();
		hometxt.src = "images/nav/hometxt.gif";
		helptxt = new Image ();
		helptxt.src = "images/nav/helptxt.gif";
		searchtxt = new Image ();
		searchtxt.src = "images/nav/searchtxt.gif";
		abouttxt = new Image ();
		abouttxt.src = "images/nav/abouttxt.gif";
		contacttxt = new Image ();
		contacttxt.src = "images/nav/contacttxt.gif";
		buytxt = new Image ();
		buytxt.src = "images/nav/buytxt.gif";
}

//swap images

function imgOn (imgname) {
	if (br =="n3"){
		document[imgname].src = eval (imgname + "on.src");
		document["text"].src = eval (imgname + "txt.src");
				
	}
}


function imgOff (imgname) {
	if (br =="n3"){
		document[imgname].src = eval (imgname + "off.src");
		document["text"].src = "images/nav/blanktxt.gif";
		window.status='Nigel Williams Rare Books';
	}
}

//catalogue drop down
//set up arrays

//for netscape 2
function makeArray() {
	var args = makeArray.arguments;
	for (var i=0; i<args.length; i++)
	{this[i] = args[i];}
	this.length = args.length;
	}

//array for decriptions

		var pages = new makeArray("Select...",

		"141 - February 07",
		"140 - December 06",
		"139 - November 06",
		"138 - September 06");
		
//array for pages

		var urls = new makeArray("",

		 "http://www.nigelwilliams.com/cats/cat141/cat141.html",
		 "http://www.nigelwilliams.com/cats/cat140/cat140.html",		 
		 "http://www.nigelwilliams.com/cats/cat139/cat139.html",
		 "http://www.nigelwilliams.com/cats/cat138/cat138.html");

//jump to page

function goPage(form) {
	var i = form.menu.selectedIndex;
	if (i != 0) {
	window.location.href = urls[i];
	}
}