String.prototype.replaceAll  = function(s1,s2){
return this.replace(new RegExp(s1,"gm"),s2);    
};
(function($){
/*
 * $-layer 0.1 - New Wave Javascript
 *
 * Copyright (c) 2008 King Wong

 * $Date: 2008-10-09  $
 */
var ___id___ = "";
var ___settings___ = {};
var isMouseDown    = false;

var currentElement = null;

var dropCallbacks = {};
var dragCallbacks = {};

var bubblings = {};

var lastMouseX;
var lastMouseY;
var lastElemTop;
var lastElemLeft;

var dragStatus = {};	

var holdingHandler = false;

$.getMousePosition = function(e){
	var posx = 0;
	var posy = 0;

	if (!e) var e = window.event;

	if (e.pageX || e.pageY) {
		posx = e.pageX;
		posy = e.pageY;
	}
	else if (e.clientX || e.clientY) {
		posx = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
		posy = e.clientY + document.body.scrollTop  + document.documentElement.scrollTop;
	}
	return { 'x': posx, 'y': posy };
};
$.updatePosition = function(e) {
	var pos = $.getMousePosition(e);

	var spanX = (pos.x - lastMouseX);
	var spanY = (pos.y - lastMouseY);
	var _top = (lastElemTop + spanY) > 0 ? (lastElemTop + spanY) : 0;
	var _left = (lastElemLeft + spanX) > 0 ? (lastElemLeft + spanX) : 0;
	$("#"+___id___).css("top",  _top);
	$("#"+___id___).css("left", _left);
};

$.fn.ondrag = function(callback){
	return this.each(function(){
		dragCallbacks[this.id] = callback;
	});
};
$.fn.ondrop = function(callback){
	return this.each(function(){
		dropCallbacks[this.id] = callback;
	});
};

$.fn.dragOff = function(){
	return this.each(function(){
		dragStatus[this.id] = 'off';
	});
};

$.fn.dragOn = function(){
	return this.each(function(){
		dragStatus[this.id] = 'on';
	});
};
$.extend({
	layerSettings:{
		id:"layerdiv",
		width:220,
		height:220,
		templete:'<div style="height:20px; width:@width@px; background-color:#777777;"><span id="@moveid@" style="position:relative; left:0px; top:0px; height:20px; width:100px;"><span id="@titleid@">@title@</span></span><span class="layerclose" style="position:relative; top:0px; float:right; right:20px; color:red;">close</span></div><div style="border:solid #ff0000 1px; width:@width@px; height:@height@px;"><div style="width:100%; height:100%; background-color:#ffffff;" id="@contentid@"></div></div>',
		content:'',
		title:'',
		isbg:true,
		opacity:0.3
	},
	layerSetup: function( settings ) {
		$.extend( $.layerSettings, settings );
		___settings___[settings.id] = settings;
		___id___ = settings.id;
	},
	layershow:function(){		
		var __bw = $("body").width();
		var __bh = $("body").height() > $(window).height() ? $("body").height() : $(window).height();
		var _width = $.layerSettings.width;
		var _height = $.layerSettings.height;
		
		if(document.getElementById(___id___)) return;
		var _moveid = ___id___ + "_move";
		var _titleid = ___id___ + "_title";
		var _contentid = ___id___ + "_content";
		var _cssurl = $.layerSettings.cssurl;
		var opacity = $.layerSettings.opacity;
		__index = $.layermaxindex();
		var __left = (__bw - _width) > 0 ? (__bw - _width)/2 : 0;
		var __top = 100;
		var __bgDiv = '<div id="'+___id___+'_background" style="background:#000000; filter:alpha(opacity='+(opacity*100)+'); opacity: '+opacity+'; width:'+__bw+'px; height:'+__bh+'px; z-index:'+(__index++)+'; position:absolute; left:0px; top:0px;"></div>';
		if($.layerSettings.isbg)
		{
			$("body").append(__bgDiv);
		}
		$("body").append('<div id="'+___id___+'" style="z-index:'+__index+';position:absolute; left:'+__left+'px; top:'+__top+'px;"></div>');
		var _templete = $.layerSettings.templete;
		var __templete = _templete.replaceAll("@width@",_width).replaceAll("@height@",_height).replaceAll("@titleid@",_titleid).replaceAll("@contentid@",_contentid).replaceAll("@title@",jQuery.layerSettings.title).replaceAll("@moveid@",_moveid);
		$("#"+___id___).append(__templete);
		$("#"+_contentid).append($.layerSettings.content);
		$("#"+_titleid).append($.layerSettings.title);
		var idd = ___id___;
		$(".layerclose").bind("click",function()
		{
			$.layerclose(idd);
		});
		$("#"+___id___).bind("click",function()
		 {
			 var id = this.id;
			 $.layerSetup(___settings___[id]);
			$(this).css("z-index",$.layermaxindex()); 
		 });
		$(document).bind("click",function(e)
		 {
			var pos = $.getMousePosition(e);
			
		 });
		$(document).mousemove(function(e){											
			if(isMouseDown && dragStatus[currentElement.id] != 'false'){
				$.updatePosition(e);
				if(dragCallbacks[currentElement.id] != undefined){
					dragCallbacks[currentElement.id](e, currentElement);
				}
				return false;
			}
		});
		$(document).mouseup(function(e){
			if(isMouseDown && dragStatus[currentElement.id] != 'false'){
				isMouseDown = false;
				if(dropCallbacks[currentElement.id] != undefined){
					dropCallbacks[currentElement.id](e, currentElement);
				}
				return false;
			}
		});
		(function(){
			bubblings[___id___] = true;

			dragStatus[___id___] = "on";
			
			//setHandler
			bubblings[this.id] = true;
			
			dragStatus[_moveid] = "handler";

			$("#"+_moveid).css("cursor", "move");	

			$("#"+_moveid).mousedown(function(e){
				var id = this.id.replace("_move","");
				___id___ = id;
				$("#"+id).css("z-index",$.layermaxindex());
				$.layerSetup(___settings___[id]);
				if((dragStatus[___id___] == "off") || (dragStatus[___id___] == "handler" && !holdingHandler))
					return bubblings["#"+___id___];
				
				isMouseDown    = true;
				currentElement = $("#"+___id___);

				var pos    = $.getMousePosition(e);
				lastMouseX = pos.x;
				lastMouseY = pos.y;

				lastElemTop  = document.getElementById(___id___).offsetTop;
				lastElemLeft = document.getElementById(___id___).offsetLeft;

				$.updatePosition(e);
				holdingHandler = true;
			});
			
			$("#"+_moveid).mouseup(function(e){
				holdingHandler = false;
			});
			//end setHandler
		})();
	},
	layerclose:function(__id)
	{
		$("#"+__id+"_background").remove();
		$("#"+__id).remove();
	},
	layermaxindex:function()
	{
		var ___index = 0;
		$.each($("*"),function(i,n){
			 var __tem = $(n).css("z-index");
			 if(__tem>0)
			 {
				if(__tem > ___index)
				{
					___index = __tem + 1;	
				}
			 }
		 });
		return ___index;
	}
});
})(jQuery);