//Speed of the automatic slideshow
var slideshowSpeed = 12000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos =  new Array();


$(document).ready(function() {
	$(document).pngFix(); 
	$("#upper-content").css({"z-index":"0"});
	$('#banner-image-list > ul > li > img').each(function() {
		var src = $(this).attr("src");
		photos.push(src);
		
	});
	
	if(photos.length>0){
		// Backwards navigation
		$("#back").click(function() {
			stopAnimation();
			navigate("back");
		});
		
		// Forward navigation
		$("#next").click(function() {
			stopAnimation();
			navigate("next");
		});
		
		var interval;
		$("#control").toggle(function(){
			
			stopAnimation();
		}, function() {
			// Change the background image to "pause"
			$(this).css({ 
				"background-image" : "url(/webcom/images/slideshow/btn_pause.png)"
				 
				});
			$(document).pngFix(); 
			// Show the next image
			navigate("next");
			
			// Start playing the animation
			interval = setInterval(function() {
				navigate("next");
			}, slideshowSpeed);
		});
		
		
		var activeContainer = 1;	
		var currentImg = 0;
		var animating = false;
		var navigate = function(direction) {
			// Check if no animation is running. If it is, prevent the action
			if(animating) {
				return;
			}
			
			// Check which current image we need to show
			if(direction == "next") {
				currentImg++;
				if(currentImg == photos.length + 1) {
					currentImg = 1;
				}
			} else {
				currentImg--;
				if(currentImg == 0) {
					currentImg = photos.length;
				}
			}
			
			// Check which container we need to use
			var currentContainer = activeContainer;
			if(activeContainer == 1) {
				activeContainer = 2;
			} else {
				activeContainer = 1;
			}
			
			showImage(photos[currentImg - 1], currentContainer, activeContainer);
			
		};
		
		var currentZindex = -1;
		var showImage = function(photoObject, currentContainer, activeContainer) {
			animating = true;
			
			// Make sure the new container is always on the background
			currentZindex--;
			
			// Set the background image of the new active container
			$("#headerimg" + activeContainer).css({
				"background-image" : "url(" + photoObject + ")",
				"display" : "block",
				"z-index" : currentZindex
			});
			
			
			
			
			// Fade out the current container
			// and display the header text when animation is complete
			$("#headerimg" + currentContainer).fadeOut(function() {
				setTimeout(function() {
				
					animating = false;
				}, 500);
			});
		};
		
		var stopAnimation = function() {
			
			// Change the background image to "play"
			$("#control").css({ 
				"background-image" : "url(/webcom/images/slideshow/btn_play.png)"
				
			});
			$(document).pngFix(); 
			// Clear the interval
			clearInterval(interval);
		};
		
		// We should statically set the first image
		navigate("next");
		
		// Start playing the animation
		interval = setInterval(function() {
			navigate("next");
		}, slideshowSpeed);
	}
	
	
});