jquery 拖動圖層

<html>
<head>
<title>test </title>
<script src=    "daqi.core.js"        ></script>
<script src=    "daqi.util.tool.js"        ></script>
<script src=    "daqix.thirdparty.jquery.jquery1.3.2.js"        ></script>
<script src=    "daqix.thirdparty.jquery.js"        ></script>
<script src=    "daqix.controller.abstract.drag.js"        ></script>
<script language="javascript">

    daqix.thirdparty.jquery.JQuery(document).ready(function(){
        var $=daqix.thirdparty.jquery.JQuery;
        var Drag=daqix.controller.abstractx.Drag;
       
        new Drag($("#a").get(0));
        new Drag($("#b").get(0));
        new Drag($("#c").get(0));
    });
</script>
</head>
<body>
<div id="a" style="position:absolute;left:20;top:190;width:100;height:150;border:1px solid #000000;z-index:1;background:#eeeeee">Layer 1</div>
<div id="b" style="position:absolute;left:60;top:10;width:100;height:150;border:1px solid #000000;z-index:2;background:#eeeeee">Layer 2</div>
<div id="c" style="position:absolute;left:100;top:90;width:100;height:150;border:1px solid #000000;z-index:3;background:#eeeeee">Layer 3</div>
</body>
</html>

 

 

 

 

 

 

$("daqix.controller.abstractx","Drag",function(){
  
    //imports
    var $=daqix.thirdparty.jquery.JQuery;
      var $$=daqi.core.SuperClass;
      this.x=null;
      this.y=null;
      this.z=null;

    //propertis

    //methods
    this.init=function(element){
        this.element=element;
        var $element=$(element);
    $element.bind("mouseup",this,this.stopdrag);
        $element.bind("mousedown",this,this.startdrag);
        $element.bind("mousemove",this,this.movedrag);
        this.element._instance=this;
    };
   
    this.startdrag=function(event){
            var inst=event.data;
            inst.element.setCapture();
            inst.z=$(inst.element).css("zIndex");
            $(inst.element).css("zIndex","100");
            inst.x=event.pageX;
            inst.y=event.pageY;
           
    }
   
    this.movedrag=function(event){
        var inst=event.data;
            if(event.button==1&&event.target==inst.element){
                $(inst.element).css("left",$(inst.element).offset().left+(event.pageX-inst.x));
                $(inst.element).css("top",$(inst.element).offset().top+(event.pageY-inst.y));
                inst.x=event.pageX;
                inst.y=event.pageY;
            }
    }
   
    this.stopdrag=function(event){
            var inst=event.data;
            $(inst.element).css("zIndex",inst.z);
            inst.element.releaseCapture();
            event.stopPropagation();
    }
});
$e(daqix.controller.abstractx.Drag,{
    selector:null
});

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