function hasSupport() {

	if (typeof hasSupport.support != "undefined")
		return hasSupport.support;
	
	var ie55 = /msie 5\.[56789]/i.test( navigator.userAgent );
	
	hasSupport.support = ( typeof document.implementation != "undefined" &&
			document.implementation.hasFeature( "html", "1.0" ) || ie55 )
			
	// IE55 has a serious DOM1 bug... Patch it!
	if ( ie55 ) {
		document._getElementsByTagName = document.getElementsByTagName;
		document.getElementsByTagName = function ( sTagName ) {
			if ( sTagName == "*" )
				return document.all;
			else
				return document._getElementsByTagName( sTagName );
		};
	}

	return hasSupport.support;
}

///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab panes
//
// el : HTMLElement		The html element used to represent the tab pane
// bUseCookie : Boolean	Optional. Default is true. Used to determine whether to us
//						persistance using cookies or not
//
function WebFXTabPane( el, bUseCookie ) {
	if ( !hasSupport() || el == null ) return;
	
	this.element = el;
	this.element.tabPane = this;
	this.pages = [];
	this.selectedIndex = null;
	this.useCookie = bUseCookie != null ? bUseCookie : true;
	
	// add class name tag to class name
	this.element.className = this.classNameTag + " " + this.element.className;
	
	// add tab row
	this.tabRow = document.createElement( "div" );
	this.tabRow.className = "tab-row";
	el.insertBefore( this.tabRow, el.firstChild );

	var tabIndex = 0;
	if ( this.useCookie ) {
		tabIndex = Number( WebFXTabPane.getCookie( "webfxtab_" + this.element.id ) );
		if ( isNaN( tabIndex ) )
			tabIndex = 0;
	}
	this.selectedIndex = tabIndex;
	
	// loop through child nodes and add them
	var cs = el.childNodes;
	var n;
	for (var i = 0; i < cs.length; i++) {
		if (cs[i].nodeType == 1 && cs[i].className == "tab-page") {
			this.addTabPage( cs[i] );
		}
	}
}

WebFXTabPane.prototype.classNameTag = "dynamic-tab-pane-control";

WebFXTabPane.prototype.setSelectedIndex = function ( n ) {
	if (this.selectedIndex != n) {
		if (this.selectedIndex != null && this.pages[ this.selectedIndex ] != null )
			this.pages[ this.selectedIndex ].hide();
		this.selectedIndex = n;
		this.pages[ this.selectedIndex ].show();
		
		if ( this.useCookie )
			WebFXTabPane.setCookie( "webfxtab_" + this.element.id, n );	// session cookie
	}
};
	
WebFXTabPane.prototype.getSelectedIndex = function () {
	return this.selectedIndex;
};
	
WebFXTabPane.prototype.addTabPage = function ( oElement ) {
	if ( !hasSupport() ) return;
	
	if ( oElement.tabPage == this )	// already added
		return oElement.tabPage;

	var n = this.pages.length;
	var tp = this.pages[n] = new WebFXTabPage( oElement, this, n );
	tp.tabPane = this;
	
	// move the tab out of the box
	this.tabRow.appendChild( tp.tab );
			
	if ( n == this.selectedIndex )
		tp.show();
	else
		tp.hide();
		
	return tp;
};
	
WebFXTabPane.prototype.dispose = function () {
	this.element.tabPane = null;
	this.element = null;		
	this.tabRow = null;
	
	for (var i = 0; i < this.pages.length; i++) {
		this.pages[i].dispose();
		this.pages[i] = null;
	}
	this.pages = null;
};



// Cookie handling
WebFXTabPane.setCookie = function ( sName, sValue, nDays ) {
	var expires = "";
	if ( nDays ) {
		var d = new Date();
		d.setTime( d.getTime() + nDays * 24 * 60 * 60 * 1000 );
		expires = "; expires=" + d.toGMTString();
	}

	document.cookie = sName + "=" + sValue + expires + "; path=/";
};

WebFXTabPane.getCookie = function (sName) {
	var re = new RegExp( "(\;|^)[^;]*(" + sName + ")\=([^;]*)(;|$)" );
	var res = re.exec( document.cookie );
	return res != null ? res[3] : null;
};

WebFXTabPane.removeCookie = function ( name ) {
	setCookie( name, "", -1 );
};








///////////////////////////////////////////////////////////////////////////////////
// The constructor for tab pages. This one should not be used.
// Use WebFXTabPage.addTabPage instead
//
// el : HTMLElement			The html element used to represent the tab pane
// tabPane : WebFXTabPane	The parent tab pane
// nindex :	Number			The index of the page in the parent pane page array
//
function WebFXTabPage( el, tabPane, nIndex ) {
	if ( !hasSupport() || el == null ) return;
	
	this.element = el;
	this.element.tabPage = this;
	this.index = nIndex;
	
	var cs = el.childNodes;
	for (var i = 0; i < cs.length; i++) {
		if (cs[i].nodeType == 1 && cs[i].className == "tab") {
			this.tab = cs[i];
			break;
		}
	}
	
	// insert a tag around content to support keyboard navigation
	
	
	var a = document.createElement( "A" );
	this.aElement = a;
	a.href = "#";
	a.onclick = function () { return false; };
	while ( this.tab.hasChildNodes() )
		a.appendChild( this.tab.firstChild );
	this.tab.appendChild( a );

	
	// hook up events, using DOM0
	var oThis = this;
	this.tab.onclick = function () { oThis.select(); };
	this.tab.onmouseover = function () { WebFXTabPage.tabOver( oThis ); };
	this.tab.onmouseout = function () { WebFXTabPage.tabOut( oThis ); };
}

WebFXTabPage.prototype.show = function () {
	var el = this.tab;
	var s = el.className + " selected";
	s = s.replace(/ +/g, " ");
	el.className = s;
	
	this.element.style.display = "block";
};

WebFXTabPage.prototype.hide = function () {
	var el = this.tab;
	var s = el.className;
	s = s.replace(/ selected/g, "");
	el.className = s;

	this.element.style.display = "none";
};
	
WebFXTabPage.prototype.select = function () {
	this.tabPane.setSelectedIndex( this.index );
};
	
WebFXTabPage.prototype.dispose = function () {
	this.aElement.onclick = null;
	this.aElement = null;
	this.element.tabPage = null;
	this.tab.onclick = null;
	this.tab.onmouseover = null;
	this.tab.onmouseout = null;
	this.tab = null;
	this.tabPane = null;
	this.element = null;
};

WebFXTabPage.tabOver = function ( tabpage ) {
	var el = tabpage.tab;
	var s = el.className + " hover";
	s = s.replace(/ +/g, " ");
	el.className = s;
};

WebFXTabPage.tabOut = function ( tabpage ) {
	var el = tabpage.tab;
	var s = el.className;
	s = s.replace(/ hover/g, "");
	el.className = s;
};


// This function initializes all uninitialized tab panes and tab pages
function setupAllTabs() {
	if ( !hasSupport() ) return;

	var all = document.getElementsByTagName( "*" );
	var l = all.length;
	var tabPaneRe = /tab\-pane/;
	var tabPageRe = /tab\-page/;
	var cn, el;
	var parentTabPane;
	
	for ( var i = 0; i < l; i++ ) {
		el = all[i]
		cn = el.className;

		// no className
		if ( cn == "" ) continue;
		
		// uninitiated tab pane
		if ( tabPaneRe.test( cn ) && !el.tabPane )
			new WebFXTabPane( el );
	
		// unitiated tab page wit a valid tab pane parent
		else if ( tabPageRe.test( cn ) && !el.tabPage &&
					tabPaneRe.test( el.parentNode.className ) ) {
			el.parentNode.tabPane.addTabPage( el );			
		}
	}
}

function disposeAllTabs() {
	if ( !hasSupport() ) return;
	
	var all = document.getElementsByTagName( "*" );
	var l = all.length;
	var tabPaneRe = /tab\-pane/;
	var cn, el;
	var tabPanes = [];
	
	for ( var i = 0; i < l; i++ ) {
		el = all[i]
		cn = el.className;

		// no className
		if ( cn == "" ) continue;
		
		// tab pane
		if ( tabPaneRe.test( cn ) && el.tabPane )
			tabPanes[tabPanes.length] = el.tabPane;
	}
	
	for (var i = tabPanes.length - 1; i >= 0; i--) {
		tabPanes[i].dispose();
		tabPanes[i] = null;
	}
}


// DOM2
if ( typeof window.addEventListener != "undefined" )
	window.addEventListener( "load", setupAllTabs, false );

// IE 
else if ( typeof window.attachEvent != "undefined" ) {
	window.attachEvent( "onload", setupAllTabs );
	window.attachEvent( "onunload", disposeAllTabs );
}

else {
	if ( window.onload != null ) {
		var oldOnload = window.onload;
		window.onload = function ( e ) {
			oldOnload( e );
			setupAllTabs();
		};
	}
	else 
		window.onload = setupAllTabs;
}

/* set up browser checks */

// check browsers
var ua		= navigator.userAgent;
var opera	= /opera [56789]|opera\/[56789]/i.test(ua);
var webkit      = /webkit/i.test(ua);
var ie		= !opera && /msie [56789]/i.test(ua);		// preventing opera to be identified as ie
var moz		= !opera && /mozilla\/[56789]/i.test(ua);	// preventing opera to be identified as mz
/* end browser checks */
/* Do includes */

if (window.pathToRoot == null)
	pathToRoot = "/";

if (ie)
	document.write('<script type="text/javascript" src="' + pathToRoot + 'dhtml/cssexpr/cssexpr.js"><\/script>');
document.write('<link type="text/css" rel="StyleSheet" href="' + pathToRoot + 'webfxlayout.css">' +
	'<link type="text/css" rel="StyleSheet" href="' + pathToRoot + 'dhtml/xmenu/xmenu.css"><\/script>' +
	'<script type="text/javascript" src="' + pathToRoot + 'dhtml/xmenu/xmenu.js"><\/script>' +
	'<script type="text/javascript" src="' + pathToRoot + 'index.pl?action=menu"><\/script>');
webfxLayout = {
	writeTitle		:	function (s, s2) {
		if (s2 == null)
			s2 = "WebFX - What you never thought possible!";

		document.write("<div id='webfx-title-background'></div>" +
			"<h1 id='webfx-title'>" + s + "</h1>" +
			"<span id='webfx-sub-title'>" + s2 + "</span>");
	},
	writeMainTitle	:	function () {
		this.writeTitle("WebFX", "What you never thought possible!");
	},
	writeTopMenuBar		:	function () {
		document.write("<div id='webfx-menu-bar-1'></div>" +
			"<div id='webfx-menu-bar-2'></div>" +
			"<div id='webfx-menu-bar'>");// div is closed in writeBottomMenuBar
	},
	writeBottomMenuBar	:	function () {
		document.write("</div><div id='webfx-menu-bar-3'></div>" +
			"<div id='webfx-menu-bar-4'></div><div id='webfx-menu-bar-5'></div>");
	},
	writeMenu			:	function () {
		if (ie || moz || opera || webkit) {
			if (ie)
				simplifyCSSExpression();
			webfxMenuImagePath = pathToRoot + "images/";
			this.writeTopMenuBar();
			document.write(webfxMenuBar);
			this.writeBottomMenuBar();
		}
		else {
			document.write(
				"<div id='webfx-menu-bar'>&nbsp;" +
				"<a href='/'>Home</a> " +
				"<a href='" + pathToRoot + "?action=sitemap'>Site Map</a> " +
				"<a href='/webboard'>WebFX Webboard</a> " +
				"</div>" +

				"<p class='warning' style='width: 500px'>" +
				"This site will look much better in a browser that supports " +
				"<a href='http://www.webstandards.org/upgrade/' " +
				"title='Download a browser that complies with Web standards.'>" +
				"web standards</a>, " +
				"but it is accessible to any browser or Internet device." +
				"</p>"
			);
		}
	},
	writeDesignedByEdger	:	function () {
		if (ie && document.body.currentStyle && document.body.currentStyle.writingMode != null)
			// IE55+
			document.write("<div id='webfx-about'>Page designed and maintained by " +
					"<a href='/contact.html#erik'>Erik Arvidsson</a> &amp; " +
					"<a href='/contact.html#emil'>Emil A Eklund</a>.</div>");
	},

	aprilFool:	function ()
	{
		if ( !ie )
			return;
		if (document.location.pathname != '/') { return; }
		if (document.location.search != '') { return; }
		var d = new Date;
		var a1st = new Date(0);
		a1st.setFullYear( d.getFullYear() );
		a1st.setMonth( 3 );
		a1st.setDate( 1 );
		if ( d > a1st && d - a1st <= 24 * 3600 * 1000 )
		{
			var res = confirm( "WebFX no longer supports Internet Explorer.\n\nPlease download " +
					 "a real browser like Mozilla Firefox, Opera 7+ or Safari." );
			if ( !res )
				res = !confirm( "Are you sure you want to continue using Internet Explorer?\n\n" +
						"Your experience will be inferior!" )
			if ( res )
				document.location = "http://mozilla.org/products/firefox/";
		}
	}

};


webfxLayout.aprilFool();

if (ie && window.attachEvent) {
	window.attachEvent("onload", function () {
		var scrollBorderColor	=	"rgb(120,172,255)";
		var scrollFaceColor		=	"rgb(234,242,255)";
		with (document.body.style) {
			scrollbarDarkShadowColor	=	scrollBorderColor;
			scrollbar3dLightColor		=	scrollBorderColor;
			scrollbarArrowColor			=	"black";
			scrollbarBaseColor			=	scrollFaceColor;
			scrollbarFaceColor			=	scrollFaceColor;
			scrollbarHighlightColor		=	scrollFaceColor;
			scrollbarShadowColor		=	scrollFaceColor;
			scrollbarTrackColor			=	"white";
		}
	});
}