/*
 *
 * Copyright (c) 2010 C. F., Wong (<a href="http://cloudgen.w0ng.hk">Cloudgen Examplet Store</a>)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 *
 */
(function($) {
    function Loader(target, p1) {
        if (target) {
            var image;
            if (typeof p1 == "string") {
                image = (p1 == "") ? "../images/zoomloader.gif" : p1;
            }
            else image = "../images/zoomloader.gif";
            var jNode = $('<div style="-moz-opacity:0.8;opacity:0.8;filter:alpha(opacity=80);color:#333;font-size:12px;font-family:Tahoma;'
				+ 'text-align:center;background-image:url(' + image + ');position:absolute;'
				+ 'background-repeat:no-repeat;background-position:43px 30px;width:100px;height:55px;z-index:999;'
				+ '">Loading</div>').appendTo("body");
            this.target = $(target).data("Loader", this).load(function() {
                jNode.remove();
                $(this).data("Loader").callBack();
            });
            //var t=parseInt(this.target.offset().top+(this.target.height()-jNode.height())/2);
            //var l=parseInt(this.target.offset().left+(this.target.width()-jNode.width())/2);
            var t = parseInt(this.target.offset().top);
            var l = parseInt(this.target.offset().left);
            this.jNode = jNode.css({ top: t, left: l })
        }
    }
    Loader.prototype.callBack = function() {
        if (typeof this.callBack == "function") this.callBack();
    }
    Loader.prototype.load = function(href, callBack) {
        var cb = this.callBack = callBack, jNode = this.jNode;
        if (this.target[0].nodeName.toLowerCase() == "img") 
            this.target.attr("src", href);
        else this.target.load(href, function() {
            jNode.remove();
            if (typeof cb == "function") 
                cb();
        })
    }
    $.fn.addLoader = function(image, callBack) { new Loader(this, image, callBack) }
    $.fn.useLoader = function(href, callBack) { this.data("Loader").load(href, callBack) }
})(jQuery);