(function($) {
    $.extend({
        progressBar: new function() {

            this.defaults = {
                increment: 2,
                speed: 15,
                showText: false, 									    // show text with percentage in next to the progressbar? - default : true
                width: 120, 										    // Width of the progressbar - don't forget to adjust your image too!!!
                boxImage: '/_layouts/1033/images/progressbar.gif', 	        // boxImage : image around the progress bar
                barImage: '/_layouts/1033/images/progressbg_black.gif',     // Image to use in the progressbar. Can be an array of images too.
                height: 12											    // Height of the progressbar - don't forget to adjust your image too!!!
            };

            /* public methods */
            this.construct = function(arg1, arg2) {
                var argpercentage = null;
                var argconfig = null;

                if (arg1 != null) {
                    if (!isNaN(arg1)) {
                        argpercentage = arg1;
                        if (arg2 != null) {
                            argconfig = arg2;
                        }
                    } else {
                        argconfig = arg1;
                    }
                }

                return this.each(function(child) {
                    var pb = this;
                    if (argpercentage != null && this.bar != null && this.config != null) {
                        this.config.tpercentage = argpercentage;
                        if (argconfig != null)
                            pb.config = $.extend(this.config, argconfig);
                    } else {
                        var $this = $(this);
                        var config = $.extend({}, $.progressBar.defaults, argconfig);
                        var percentage = argpercentage;
                        if (argpercentage == null)
                            var percentage = $this.html().replace("%", ""); // parsed percentage


                        $this.html("");
                        var bar = document.createElement('img');
                        var text = document.createElement('span');
                        bar.id = this.id + "_percentImage";
                        text.id = this.id + "_percentText";
                        bar.src = config.boxImage;
                        bar.width = config.width;
                        var $bar = $(bar);
                        var $text = $(text);

                        this.bar = $bar;
                        this.ntext = $text;
                        this.config = config;
                        this.config.cpercentage = 0;
                        this.config.tpercentage = percentage;

                        $bar.css("width", config.width + "px");
                        $bar.css("height", config.height + "px");
                        $bar.css("background-image", "url(" + config.barImage + ")");
                        $bar.css("padding", "0");
                        $bar.css("margin", "0");
                        $this.append($bar);
                        $this.append($text);
                        //bar.alt = this.tpercentage;
                        //bar.title = this.tpercentage;
                        bar.title = $this[0].title;
                    }



                    var t = setInterval(function() {
                        var config = pb.config;
                        var cpercentage = parseInt(config.cpercentage);
                        var tpercentage = parseInt(config.tpercentage);
                        var increment = parseInt(config.increment);
                        var bar = pb.bar;
                        var text = pb.ntext;
                        var pixels = config.width / 100; 		// Define how many pixels go into 1%

                        bar.css("background-position", (((config.width * -1)) + (cpercentage * pixels)) + 'px 50%');

                        if (config.showText)
                            text.html(" " + Math.round(cpercentage) + "%");

                        if (cpercentage > tpercentage) {
                            if (cpercentage - increment < tpercentage) {
                                pb.config.cpercentage = 0 + tpercentage
                            } else {
                                pb.config.cpercentage -= increment;
                            }
                        }
                        else if (pb.config.cpercentage < pb.config.tpercentage) {
                            if (cpercentage + increment > tpercentage) {
                                pb.config.cpercentage = tpercentage
                            } else {
                                pb.config.cpercentage += increment;
                            }
                        }
                        else {
                            clearInterval(t);
                        }
                    }, pb.config.speed);
                });
            };
        }
    });

    $.fn.extend({
        progressBar: $.progressBar.construct
    });

})(jQuery);