/* Browser detect
------------------------------------------------------------------*/
function BrowserDetectLite() {
	var ua = navigator.userAgent.toLowerCase();

	// browser name
	this.isGecko     = (ua.indexOf('gecko') != -1 && ua.indexOf('safari') == -1);
	this.isMozilla   = (this.isGecko && ua.indexOf('gecko/') + 14 == ua.length);
	this.isNS        = ( (this.isGecko) ? (ua.indexOf('netscape') != -1) : ( (ua.indexOf('mozilla') != -1) && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1) ) );
	this.isIE        = ( (ua.indexOf('msie') != -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) );
	this.isSafari    = (ua.indexOf('safari') != - 1);
	this.isOpera     = (ua.indexOf('opera') != -1);
	this.isKonqueror = (ua.indexOf('konqueror') != -1 && !this.isSafari);
	this.isIcab      = (ua.indexOf('icab') != -1);
	this.isAol       = (ua.indexOf('aol') != -1);

	// spoofing and compatible browsers
	this.isIECompatible = ( (ua.indexOf('msie') != -1) && !this.isIE);
	this.isNSCompatible = ( (ua.indexOf('mozilla') != -1) && !this.isNS && !this.isMozilla);

	// browser version
	this.versionMinor = parseFloat(navigator.appVersion);

	// correct version number
	if (this.isNS && this.isGecko) {
		this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
	}
	else if (this.isIE && this.versionMinor >= 4) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );
	}
	else if (this.isMozilla) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) );
	}
	else if (this.isSafari) {
		this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
	}
	else if (this.isOpera) {
		if (ua.indexOf('opera/') != -1) {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera/') + 6 ) );
		}
		else {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera ') + 6 ) );
		}
	}
	else if (this.isKonqueror) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('konqueror/') + 10 ) );
	}
	else if (this.isIcab) {
		if (ua.indexOf('icab/') != -1) {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab/') + 6 ) );
		}
		else {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab ') + 6 ) );
		}
	}

	this.versionMajor = parseInt(this.versionMinor);
	this.geckoVersion = ( (this.isGecko) ? ua.substring( (ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14) ) : -1 );

	// dom support
	this.isDOM1 = (document.getElementById);
	this.isDOM2Event = (document.addEventListener && document.removeEventListener);

	// css compatibility mode
	this.mode = document.compatMode ? document.compatMode : 'BackCompat';

	// platform
	this.isWin   = (ua.indexOf('win') != -1);
	this.isWin32 = (this.isWin && ( ua.indexOf('95') != -1 || ua.indexOf('98') != -1 || ua.indexOf('nt') != -1 || ua.indexOf('win32') != -1 || ua.indexOf('32bit') != -1 || ua.indexOf('xp') != -1) );
	this.isMac   = (ua.indexOf('mac') != -1);
	this.isUnix  = (ua.indexOf('unix') != -1 || ua.indexOf('sunos') != -1 || ua.indexOf('bsd') != -1 || ua.indexOf('x11') != -1)
	this.isLinux = (ua.indexOf('linux') != -1);

	// specific browser shortcuts
	this.isNS4x  = (this.isNS && this.versionMajor == 4);
	this.isNS40x = (this.isNS4x && this.versionMinor < 4.5);
	this.isNS47x = (this.isNS4x && this.versionMinor >= 4.7);
	this.isNS4up = (this.isNS && this.versionMinor >= 4);
	this.isNS6x  = (this.isNS && this.versionMajor == 6);
	this.isNS6up = (this.isNS && this.versionMajor >= 6);
	this.isNS7x  = (this.isNS && this.versionMajor == 7);
	this.isNS7up = (this.isNS && this.versionMajor >= 7);

	this.isIE4x  = (this.isIE && this.versionMajor == 4);
	this.isIE4up = (this.isIE && this.versionMajor >= 4);
	this.isIE5x  = (this.isIE && this.versionMajor == 5);
	this.isIE55  = (this.isIE && this.versionMinor == 5.5);
	this.isIE5up = (this.isIE && this.versionMajor >= 5);
	this.isIE6x  = (this.isIE && this.versionMajor == 6);
	this.isIE6up = (this.isIE && this.versionMajor >= 6);

	this.isIE4xMac = (this.isIE4x && this.isMac);
}
var browser = new BrowserDetectLite();


/* Register event handlers
------------------------------------------------------------------*/
// Normal events (handled by event:Selectors)
var Rules = {
	'#button_home:click': function() { loadPage('Home', 'deco1'); },
	'#button_about:click': function() { loadPage('About', 'deco2'); },
	'#button_faq:click': function() { loadPage('FAQ', 'deco3'); },
	'#button_contact:click': function() { loadPage('Contact', 'deco4'); },
	'#button_disclaimer a:click': function(element) { loadPage('Disclaimer', 'deco4'); },
	'#navigation li:mouseover': function(element) { moveButton(element); }
}

// Special window events
Event.observe(window, 'load', function() {
	$('head').currentDeco = 'head_deco1';
	$('foot').currentDeco = 'foot_deco1';
	fixPNGs();
	EventSelectors.start(Rules);
});


/* PNG Fix for IE 6-
------------------------------------------------------------------*/
function fixPNGs() {
	if (browser.isIE5x || browser.isIE6x) { 
		var blank = "/media/images/empty.gif";
		
		if (document.all) {
			all = document.all;
		} else if (!document.all && document.getElementsByTagName) { 
			all = document.getElementsByTagName('*');
		} else { 
			return;
		}
		
		for (i=0; i < all.length; i++) { 
			element = all[i];
			
			if (element.nodeName.toLowerCase() == 'img') {
				if( /\.png$/.test(element.src.toLowerCase())) {
					element.style.width = element.width + 'px';
					element.style.height = element.height + 'px';
					element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + element.src + "',sizingMethod='scale')";
					element.src=blank;
				} else {
					element.runtimeStyle.filter = "";
				}
			} else {
				if (element.getAttribute( 'background')) {
					if ( /\.png$/.test( element.getAttribute( 'background' ).toLowerCase())) {
						element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + element.getAttribute( 'background' ) + "',sizingMethod='scale')";
						element.setAttribute( 'background', '' );
					}
				} else {
					if (element.style.backgroundImage) {
						if( /\.png$/.test( element.style.backgroundImage.replace( 'url(', '' ).replace( ')', '' ).toLowerCase())) {
							element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + element.style.backgroundImage.replace( 'url(', '' ).replace( ')', '' ) + "',sizingMethod='scale')";
							element.style.backgroundImage = '';
						}
					}
				}
			}
		}
	}
}


/* Event Handlers
------------------------------------------------------------------*/

function changeBackground(showElement) {
	var headElement = 'head_' + showElement;
	var footElement = 'foot_' + showElement;
	
	if (headElement != $('head').currentDeco && $('head').animating != true) {
		$('head').animating = true;
		new Effect.Fade($('foot').currentDeco, { duration:0.3 });
		new Effect.Appear(footElement, { duration:0.3 });
		new Effect.Fade($('head').currentDeco, { duration:0.3 });
		new Effect.Appear(headElement, { duration:0.3, afterFinish: function() { $('head').animating = false; } });
		$('head').currentDeco = headElement;
		$('foot').currentDeco = footElement;
	}
}

function loadPage(pageName, backgroundElement) {
	if ($('right')) {
		$('right').innerHTML = '';
		$('content').style.backgroundImage = 'url(/media/images/loader.gif)';
	}

	new Ajax.Updater('content', '/index.php?Show=' + pageName + '&amp;Random=' + Math.random(), { asynchronous:true, onComplete: function() { 
		$('content').style.backgroundImage = '';
		changeBackground(backgroundElement); 
	}});
}

function moveButton(element) {
	//nothing
}