/*
* Author:      Marco Kuiper (http://www.marcofolio.net/)
*/

// Speed of the automatic slideshow
var slideshowSpeed = 4500;
var fadeSpeed = 2000;

// Variable to store the images we need to set as background
// which also includes some text and url's.

	$(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(images/" + photoObject.image + ")",
	            "display": "block",
	            "z-index": currentZindex
	        });

	        $("#publicidad").css({ "display": "none" });
	        $("#linkto").css({ "display": "none" });

	        if (photoObject.url != "") {
	            $("#linkto")
                    .attr("href", photoObject.url)
                    .attr("target", photoObject.target)
                    .css({ "display": "block" });   
            }	        

	        // Fade out the current container
	        // and display the header text when animation is complete
	        $("#headerimg" + currentContainer).fadeOut(fadeSpeed, function () {
	            setTimeout(function () {
	                $("#publicidad").css({ "display": "block" });
	                animating = false;
	            }, 0);
	        });
	    };

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

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

	});