function toonPopup(mypage, myname, w, h) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+', toolbar=0, scrollbars=0, location=0, status=0, titlebar=0, menubar=0, resizable=0';
	
	win = window.open(mypage, myname, winprops);
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
		return '';
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return -1;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
//			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};

var preLoad;
var j;
var aantal;
var opac;
var toppiclay;
var botpiclay;
var t ;
var busy;
var shortdelay;
var longdelay;
var opacinc;
var topimg;
var botimg;

function doPf(longdelay, shortdelay){
	clearTimeout(t);
	opac -= opacinc; 
	if (busy == 0) {
		busy = 1;
		if (opac <= 0) {
			if (BrowserDetect.browser != 'Firefox') {
				toppiclay.visibility='hidden';
			}
			topimg.src = preLoad[j].src;
			opac = 100;
			toppiclay.opacity = 1.0;
			toppiclay.MozOpacity = 1.0;
			toppiclay.KhtmlOpacity = 1.0;
			toppiclay.filter = "alpha(opacity=100)";
			t = setTimeout('swapImg('+longdelay+', '+shortdelay+')', longdelay);
			
		} else {
			toppiclay.opacity = (opac / 100);
			toppiclay.MozOpacity = (opac / 100);
			toppiclay.KhtmlOpacity = (opac / 100);
			toppiclay.filter = "alpha(opacity=" + opac + ")";
			t = setTimeout('doPf('+longdelay+', '+shortdelay+')', shortdelay);
		}
		busy = 0;
	}
} 

function swapImg(index, longdelay, shortdelay) {
	clearTimeout(t);
	if (busy == 0) {
		busy = 1;
		j = (j + 1) % aantal;
		if (BrowserDetect.browser != 'Firefox') {
			toppiclay.visibility='visible';
			botpiclay.visibility='hidden';
		}
		botimg.src = preLoad[j].src;	
		if (BrowserDetect.browser != 'Firefox') {
			botpiclay.visibility='visible';
		}
		t = setTimeout('doPf('+index+', '+longdelay+', '+shortdelay+')', shortdelay);
		busy = 0;
	}						
}

BrowserDetect.init();