JS点击2

 <!DOCTYPE html>

 <html lang="en">

 <head>

     <meta charset="UTF-8">

     <title>Document</title>

     <style type="text/css">

         #div1{

             width: 200px;

             height: 200px;

             border: 1px solid black;

         }

     </style>

     <script type="text/javascript">

     function toChange(name, value){

         var a=document.getElementById("div1");

         a.style[name]=value;

     }

     </script>

 </head>

 <body>

     <input type="button" value="变蓝" onclick="toChange('background', 'blue')" />

     <input type="button" value="变高" onclick="toChange('height', '300px')"/>

     <input type="button" value="变宽" onclick="toChange('width', '300px')"/>

     <div id="div1"></div>

 </body>

 </html>
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JS点击2

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