function popup() {
	popupwindow = window.open("characters.html", "special", "width=320,height=240,resizable=yes,scrollbars=no,location=no,status=no");
}

function placeLetter(letter, answerboxnumber) {
	document.getElementById(answerboxnumber).value = letter;
	document.getElementById(answerboxnumber).focus();
}

function fixPng() {
	var img = document.getElementById("pngImage");
	var src = img.src;
	img.style.visibility = "hidden";
	var div = document.createElement("DIV"); 
	div.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src= ' " + src + " ' , sizing='scale')";
	img.replaceNode(div);
}

function setFillerHeight(spacerHeight) {
	if (document.body.clientWidth <= 1024)
	{
		document.write("<br /><img src='../pictures/filler.jpg' alt='' title='' style='visibility: hidden; width: 100px; height: " + spacerHeight + "px;' />");
	}
}

function setFrameHeight(spacerHeight) {
	if (document.body.clientWidth <= 1024)
	{
		if (BrowserDetect.browser == "Explorer")
		{
			document.write("<img src='../pictures/filler.jpg' alt='' title='' style='visibility: hidden; width: 100px; height: " + spacerHeight - 1 + "px;' />");
		}
		else
		{
			document.write("<img src='../pictures/filler.jpg' alt='' title='' style='visibility: hidden; width: 100px; height: " + spacerHeight + "px;' />");
		}
	}
}

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;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		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"
		}
	]

};
BrowserDetect.init();