一个可以拖拽的div

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>Document</title>

     <style>

         #box{

             margin:100px;

             width: 200px;

             height: 200px;

             background-color: green;

         }

         #box:hover{

             cursor: pointer;

         }

     </style>

 </head>

 <body>

 <div>

     <div id="box"></div>

     </div>

     <script>

         var $box=document.getElementById('box');

         var $x,$y;

         $box.onmousedown=function(e){

             $x=parseInt(e.pageX-parseInt($box.offsetLeft));

             $y=parseInt(e.pageY-parseInt($box.offsetTop));

             $box.onmousemove=function(e){

                 $box.style.marginLeft=e.pageX-$x+'px';

                 $box.style.marginTop=e.pageY-$y+'px';

             }

         }

         window.onmouseup=function(){

             $box.onmousemove=null;

         }

     </script>

 </body>

 </html>
巴特西

一个可以拖拽的div

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