var Drag={
   "obj":null,
   "init":function(a, aRoot, ee){
      if (ee ==null) {
         a.onmousedown=Drag.start;
      }
      a.root = aRoot;
      if(isNaN(parseInt(a.root.style.left)))a.root.style.left="0px";
      if(isNaN(parseInt(a.root.style.top)))a.root.style.top="0px";
      a.root.onDragStart=new Function();
      a.root.onDragEnd=new Function();
      a.root.onDrag=new Function();
      if (ee !=null) {
         var b=Drag.obj=a;
         ee=Drag.fixE(ee);
         var c=parseInt(b.root.style.top);
         var d=parseInt(b.root.style.left);
         b.root.onDragStart(d,c,ee.clientX,ee.clientY);
         b.lastMouseX=ee.clientX;
         b.lastMouseY=ee.clientY;
         document.onmousemove=Drag.drag;
         document.onmouseup=Drag.end;
      }

   },
   "start":function(a){
      var b=Drag.obj=this;
      a=Drag.fixE(a);
      var c=parseInt(b.root.style.top);
      var d=parseInt(b.root.style.left);
      b.root.onDragStart(d,c,a.clientX,a.clientY);
      b.lastMouseX=a.clientX;
      b.lastMouseY=a.clientY;
      document.onmousemove=Drag.drag;
      document.onmouseup=Drag.end;
      return false;
   },	
   "drag":function(a){
      a=Drag.fixE(a);
      var b=Drag.obj;
      var c=a.clientY;
      var d=a.clientX;
      var e=parseInt(b.root.style.top);
      var f=parseInt(b.root.style.left);
      var h,g;
      h=f+d-b.lastMouseX;
      g=e+c-b.lastMouseY;
      b.root.style.left=h+"px";
      b.root.style.top=g+"px";
      b.lastMouseX=d;
      b.lastMouseY=c;
      b.root.onDrag(h,g,a.clientX,a.clientY);
      return false;
   },
   "end":function(){
      document.onmousemove=null;
      document.onmouseup=null;
      Drag.obj.root.onDragEnd(parseInt(Drag.obj.root.style.left),parseInt(Drag.obj.root.style.top));
      Drag.obj=null;
   },
   "fixE":function(a){
      if(typeof a=="undefined")a=window.event;
      if(typeof a.layerX=="undefined")a.layerX=a.offsetX;
      if(typeof a.layerY=="undefined")a.layerY=a.offsetY;
      return a;
   }
};

var vdwdrag=Drag;