/*
 *
 * 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($){
	function Loader(target,p1){
		if(target){
			var image;
			if (typeof p1=="string"){ 
				image=(p1=="")?"../../images/ajax-loader.gif":p1;
			}
			else image="../../images/ajax-loader.gif";
			var jNode=$('<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);
			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);