實現prependChild方法,即appendChild的相對方法

來源:互聯網
上載者:User
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html xmlns="http://www.w3.org/1999/xhtml">    <head>        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />        <title>New Web Project</title>        <style type="text/css">            span{                color: #66A300;                font-family: "Arial Black";            }        </style>    </head>    <body>         <div id="main">             <span>hello!</span>         </div>                  <script type="text/javascript">             Node.prototype.prependChild = function (newNode){                 this.insertBefore(newNode,this.firstChild);             }                          var main = document.getElementById("main");             var node = document.createElement("span");             node.innerHTML = "World,";             main.prependChild(node);         </script>    </body></html>

 

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