DOM操作HTML文档添加数据实例

答案：<html>
<head>
<title>DOM操作HTML文档实例</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="javascript" type="text/javascript">
      // 增加分类函数
      function addSort()
      {
         var name = document.getElementById("name").value;
          if(name == "" ) {
                alert("请输入分类名称！");
                document.getElementById("name").focus();
                return;
          }
 
          var row = document.createElement("tr");
          row.setAttribute("id", name);
          var cell = document.createElement("td");
          cell.appendChild(document.createTextNode(name));
          row.appendChild(cell);          
          var deleteButton = document.createElement("input");
          deleteButton.setAttribute("type", "button");
          deleteButton.setAttribute("value", "删除");
          deleteButton.onclick = function () { deleteSort(name); };
          cell = document.createElement("td");
          cell.appendChild(deleteButton);
          row.appendChild(cell); 
          document.getElementById("sortList").appendChild(row);
      //清空输入框
          document.getElementById("name").value = "";
      }
      // 删除分类函数
      function deleteSort(id)
      {
            if (id!=null)
            {
                   var rowToDelete = document.getElementById(id);
                   var sortList = document.getElementById("sortList");
                   sortList.removeChild(rowToDelete);
            }
      }

</script>
</head>
<body>
<table style="width:400px; background-color:#99ccff;">
<tbody>
      <tr>
          <td align="center" colspan="3"><b>分 类 管 理</b></td>
      </tr>
      <tr>
            <td height="20" style="width: 177px">增加分类</td>
            <td height="20">
                 <input id="name" type="text" size="15">
            </td>
            <td height="20">
                  <input type="button" id="submit1" value="添加" onclick="addSort();" />
            </td> 
      </tr>
      <tr>
            <td height="20" style="font-weight: bold; width: 177px" colspan="3">
                已经添加的分类 </td>
      </tr>
</tbody>
</table>
<table style="border:1px solid #000000;" width="400">
    <tr>
          <td >分类名称</td>
          <td id="pos_1">操作</td>
    </tr>
    <tbody id="sortList" ></tbody>
</table>
</body>
</html>
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