/* BEGIN OF INCLUDED FILE '/modules/headerimage/js/headerimage.js' */


// Init slideshow if first slide found
if (window.dojo) {
    dojo.addOnLoad(function(){
        if (dojo.byId('headerimageSlide0') && dojo.byId('headerimageSlide1')) { // we need at least two slides
            window.headerimage.startSlideshow();
        }
    });
}

// Create namespace
window.headerimage = new Object();

// Array containing all slide nodes
window.headerimage.DELAY = 6000;  
window.headerimage.DURATION = 750;
window.headerimage.currentOffset = 0;
window.headerimage.allSlides = new Array();

// Start slideshow
window.headerimage.startSlideshow = function() {
	var containerNode = dojo.byId("headerimageSlideshow");
    // find all slides
    window.headerimage.allSlides = dojo.query(".headerimageSlide", containerNode);
    // set the size of all slides to the size of the container, set the z-index
    for(var i=0; i<window.headerimage.allSlides.length; i++) {
    	dojo.style(window.headerimage.allSlides[i], "width", containerNode.offsetWidth+"px");
    	dojo.style(window.headerimage.allSlides[i], "height", "160px");
    	dojo.style(window.headerimage.allSlides[i], "zIndex", 8);
    }
    // make all but the first slide transparent
    dojo.style(window.headerimage.allSlides[0], "opacity", 1.0);
    dojo.style(window.headerimage.allSlides[0], "visibility", "visible");
    for(var i=1; i<window.headerimage.allSlides.length; i++) {
        dojo.style(window.headerimage.allSlides[i], "opacity", 0.0);
        dojo.style(window.headerimage.allSlides[i], "visibility", "visible"); // slides are hidden when loading
    }
    // start the slideshow loop
    window.setTimeout(window.headerimage.nextSlide, window.headerimage.DELAY);
};

// Skip to next slide
window.headerimage.nextSlide = function() {
    var newOffset = window.headerimage.currentOffset + 1;
    if (newOffset >= window.headerimage.allSlides.length) {
        newOffset = 0;
    }
    window.headerimage.gotoSlide(newOffset);
    // repeat the slideshow loop forever
    window.setTimeout(window.headerimage.nextSlide, window.headerimage.DELAY);
};

// Goto given slide
window.headerimage.gotoSlide = function(newOffset) {
    var oldOffset = window.headerimage.currentOffset;
    // set z-indexes
    dojo.style("headerimageSlide"+oldOffset, "zIndex", 8);
    dojo.style("headerimageSlide"+newOffset, "zIndex", 9);
    // fade in new slide and make old slide invisible on end
    var fadeIn = dojo.animateProperty(
    	{
    		node: "headerimageSlide"+newOffset,
    		duration: window.headerimage.DURATION,
    		properties: {
    			opacity: 1.0
    		},
    		onEnd: function() {
    			dojo.style("headerimageSlide"+oldOffset, "opacity", 0.0);
    		}
    	}
    );
    fadeIn.play();
    // set current slide
    window.headerimage.currentOffset = newOffset;
};



/* END OF INCLUDED FILE '/modules/headerimage/js/headerimage.js' */