I have a slideshow I've found online. It's quite a large slideshow and the images take a really long time to load and I've already reduced the file size. I was hoping someone could show me how I preload the images to hopefully make it load quickly.
I'm also having another problem when viewing on a mobile site, it seems to shrink the image. I need it to stay full size.
The code is below:
// Speed of the automatic slideshow
var slideshowSpeed = 4000;
// Variable to store the images we need to set as background
// which also includes some text and url's.
var photos = [ {
"title" : "Stairs",
"image" : "banner1.png",
"url" : "http://www.sxc.hu/photo/1221065",
"firstline" : "Going on",
"secondline" : "vacation?"
}, {
"title" : "Office Appartments",
"image" : "Karreman_Calendar1.jpg",
"url" : "http://www.sxc.hu/photo/1221065",
"firstline" : "Or still busy at",
"secondline" : "work?"
}, {
"title" : "Mountainbiking",
"image" : "Karreman_Calendar2.jpg",
"url" : "http://www.sxc.hu/photo/1221065",
"firstline" : "Get out and be",
"secondline" : "active"
}, {
"title" : "Mountains Landscape",
"image" : "Karreman_Calendar3.jpg",
"url" : "http://www.sxc.hu/photo/1271915",
"firstline" : "Take a fresh breath of",
"secondline" : "nature"
}, {
"title" : "Italian pizza",
"image" : "Karreman_Calendar4.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar5.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar6.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar8.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar9.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar10.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar11.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar12.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
},
{
"title" : "Italian pizza",
"image" : "Karreman_Calendar13.jpg",
"url" : "http://www.sxc.hu/photo/1042413",
"firstline" : "Enjoy some delicious",
"secondline" : "food"
}
];
$(document).ready(function() {
// 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(images/btn_pause.png)" });
// 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(/karreman/slideshow/" + photoObject.image + ")",
"display" : "block",
"z-index" : currentZindex
});
// Hide the header text
$("#headertxt").css({"display" : "none"});
// Set the new header text
$("#firstline").html(photoObject.firstline);
$("#secondline")
.attr("href", photoObject.url)
.html(photoObject.secondline);
$("#pictureduri")
.attr("href", photoObject.url)
.html(photoObject.title);
// Fade out the current container
// and display the header text when animation is complete
$("#headerimg" + currentContainer).fadeOut(function() {
setTimeout(function() {
$("#headertxt").css({"display" : "block"});
animating = false;
}, 500);
});
};
var stopAnimation = function() {
// Change the background image to "play"
$("#control").css({ "background-image" : "url(images/btn_play.png)" });
// Clear the interval
clearInterval(interval);
};
// We should statically set the first image
navigate("next");
// Start playing the animation
interval = setInterval(function() {
navigate("next");
}, slideshowSpeed);