// JavaScript Document

var photos = [ {
     "image" : "bg1.jpg"
   	}, {
     
	 "image" : "bg2.jpg"
    }, {
     
	 "image" : "bg3.jpg"
    }
   		// More pictures if we want
	];
 
	var slideshowSpeed = 6000000;
	
	var lastSelected="";


	$(document).ready(function() {

	    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.image + ")",
	            "display": "block",
	            "z-index": currentZindex
	        });


	        $("#heroCopy" + currentImg).css("display", "block");
	        $("#heroCopy" + lastSelected).css("display", "none");

	        $("#SpanPromoLink" + currentImg + "> a").addClass("selected");
	        $("#SpanPromoLink" + lastSelected + "> a").removeClass("selected");

	        lastSelected = currentImg;

	        // Fade out the current container
	        // and display the header text when animation is complete
	        $("#headerimg" + currentContainer).fadeOut(function() {
	            setTimeout(function() {

	                animating = false;
	            }, 1000);
	        });

	    };



	    // We should statically set the first image
	    navigate("next");


	    // Start playing the animation
	    interval = setInterval(function() {
	        navigate("next");
	    }, slideshowSpeed);

	});