var object = null;
   var object_x = 0;
   var object_y = 0;
   var mouse_x = 0;
   var mouse_y = 0;

   function draganddrop() {
       document.onmousemove = drag;
       document.onmouseup = drop;
   }

   function moveable(obj) {
       object = obj;
       object_x = mouse_x - object.offsetLeft;
       object_y = mouse_y - object.offsetTop;
   }

   function drop() {
       object = null;
   }

   function drag(event) {
       mouse_x = document.all ? window.event.clientX : event.pageX;
       mouse_y = document.all ? window.event.clientY : event.pageY;

       if(object != null) {
           object.style.left = (mouse_x - object_x) + "px";
           object.style.top = (mouse_y - object_y) + "px";
       }
   }
      function zeige(obj){
   var target = document.getElementById(obj);
   if(target.style.display=="none"){target.style.display="inline"}
   else{target.style.display="none"}
   }// JavaScript Document