var userAgent = navigator.userAgent.toLowerCase();
var fallbackOverlayImage = "images/overlay.png";
var overlayDuration = 0.2;
var overlayOpacity = 0.8;
resizeDuration = (11 - 5) * 0.15;

Object.extend(Element, {
	getWidth: function(element) {
	   	element = $(element);
	   	return element.offsetWidth; 
	},
	setWidth: function(element,w) {
	   	element = $(element);
    	element.style.width = w +"px";
	},
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"px";
	},
	setSrc: function(element,src) {
    	element = $(element);
    	element.src = src; 
	},
	setHref: function(element,href) {
    	element = $(element);
    	element.href = href; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

var lightbox = {
  require: function(libraryName) {
    
  },
  start: function(){
	hideSelectBoxes();		
	hideFlash();
	
	//
	if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1 || userAgent.indexOf('camino')!=-1) {
		Element.show('lightbox');
	}else{ // Non-Mac, carry on as usual.
		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });
	}
	
	var arrayPageSize = getPageSize();
	Element.setWidth('overlay', arrayPageSize[0]);
	Element.setHeight('overlay', arrayPageSize[1]);
	
	var arrayPageScroll = getPageScroll();
	var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
	var lightboxLeft = arrayPageScroll[0];
	Element.setTop('lightbox', lightboxTop);
	Element.setLeft('lightbox', lightboxLeft);
	
	Element.show('lightbox');
	$('lightboxContent').innerHTML = $('lightboxDataContent').innerHTML;
	
  },
  end: function() {
	Element.hide('lightbox');
	new Effect.Fade('overlay', { duration: overlayDuration});
	showSelectBoxes();
	showFlash();
  },
  load: function() {
	var objBody = document.getElementsByTagName("body").item(0);
	
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	
	// The mozilla flavors on the mac, specifically Firefox and Camino have difficulties displaying flash over anything with dynamically generated opacity.
	// Here we're using the fallBackOverlayImage to alleviate this problem.    This is a semi-transparent png which is included with the script.
	if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1 || userAgent.indexOf('camino')!=-1) {
		objOverlay.style.backgroundImage = 'url('+fallbackOverlayImage+')';
		objOverlay.style.backgroundRepeat = 'repeat';
	}else{
		objOverlay.style.backgroundColor = '#000000';
	}
	objOverlay.style.display = 'none';
	objOverlay.onclick = function() { lightbox.end(); }
	objBody.appendChild(objOverlay);
	
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.style.display = 'none';
	objLightbox.onclick = function(e) {
		if (!e) var e = window.event;
		var clickObj = Event.element(e).id;
		if ( clickObj == 'lightbox') {
			lightbox.end();
		}
	};
	objBody.appendChild(objLightbox);

	var objLightboxContent = document.createElement("span");
	objLightboxContent.setAttribute('id','lightboxContent');
	objLightbox.appendChild(objLightboxContent);
	
	setTimeout(function(){lightbox.start()}, 1000 * 0)
	
  }
  
}

// ---------------------------------------------------

function showSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

// ---------------------------------------------------

function hideSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
}

// ---------------------------------------------------

function showFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "visible";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "visible";
	}
}

// ---------------------------------------------------

function hideFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "hidden";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "hidden";
	}

}

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
}

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// For small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// For small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

/////////
function eventOnload(){
	lightbox.load();
}

/*if (window.addEventListener){
	window.addEventListener("load", eventOnload, false);
}else if (window.attachEvent){
	window.attachEvent("onload", eventOnload);
}else{
	window.onload=eventOnload;
}*/