JavaScript实现表单内容在页面中显示的方法

<html>
 <head>  
  <title>测试</title>
  <script type="text/javascript">
   function to()
   {
   var txt=document.getElementById("txt").value;
   document.getElementById("a").innerHTML+=txt;
   }   
  </script>
 </head>
 <body>
  <div id="a">在这里显示：</div>
  <button onclick="to();">输入</button>
 </body>
</html>

<html>
 <head>  
  <title>测试</title>
  <script type="text/javascript">
   function to()
   {
   var txt=document.getElementById("txt").value;
   var row=document.getElementById("ib").insertRow();
   row.align="center";
   var tt0=row.insertCell();
   tt0.innerHTML=txt;
   }   
  </script>
 </head>
 <body>
  <div id="a"></div>
  <table id="ib">
  <tr>
  <th>content</th>
  </tr>
  </table>
  <input type="text" id="txt" value="" size="30">
  <button onclick="to();">输入</button>
 </body>
</html>