A jQuery plugin to change the background image of an element from a list of images

change-background.plugin.js

/*===============================

Usage:
    
    $(document).ready(function() {
        $('body').changeBackground({
            'path': '', // path to images (eg. /wp-content/themes/mytheme/ )
            'images': [], // images list eg. ['img1.jpg', 'img2.jpg', 'img3.jpg'] 
            'interval': 1000 // transition time in miliseconds
});
    });

=================================*/

(function($){
    $.ChangeBackground = function(el, options){
        // To avoid scope issues, use 'base' instead of 'this'
        // to reference this class from internal events and functions.
        var base = this;
        
        // Access to jQuery and DOM versions of element
        base.$el = $(el);
        base.el = el;
        
        // Add a reverse reference to the DOM object
        base.$el.data("ChangeBackground", base);
        
        base.init = function(){
            base.options = $.extend({},$.ChangeBackground.defaultOptions, options);
            
            // Put your initialization code here
            setInterval(base.setBackground, base.options.interval);
            
        };
        
        // Sample Function, Uncomment to use
        base.setBackground = function(){
            var poza = base.options.images[Math.floor(Math.random()*base.options.images.length)];
            $(el).css('background-image', 'url('+ base.options.path + poza + ')');
        };
        
        // Run initializer
        base.init();
    };
    
    $.ChangeBackground.defaultOptions = {
        path: "",
        images: [],
        interval: 1000
    };
    
    $.fn.changeBackground = function(options){
        return this.each(function(){
            (new $.ChangeBackground(this, options));
        });
    };
    
    // This function breaks the chain, but returns
    // the ChangeBackground if it has been attached to the object.
    $.fn.getChangeBackground = function(){
        this.data("ChangeBackground");
    };
    
})(jQuery);