<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>表格操作</title>
<style type="text/css">
body {
   font-size: 13px;
   line-height: 25px;
}
table {
   border-top: 1px solid #333;
   border-bottom: 1px solid #333;
   width: 300px;
}
td {
    border-right: 1px solid #333;
   border-bottom: 1px solid #333;
}
.title {
   text-align: center;
   font-weight: bold;
   background: #ccc;
}
.center {
   text-align: center;
}
#displayInfo {
   color: red;
}
</style>
<script type="text/javascript">
   function addRow() { //增加一行
      var tableObj = document.getElementById('myTable');
      var rowNums = tableObj.rows.length;
      var newRow = tableObj.insertRow(rowNums);
      var col1 = newRow.insertCell(0);
      col1.innerHTML = "幸福从天而降";
      
      var col2 = newRow.insertCell(1);
      col2.innerHTML = "$18.5";
      col2.align = "center";
      
      var divInfo = document.getElementById('displayInfo');
      divInfo.innerHTML = "添加商品成功";
   }
   
   function delRow() {  //删除第二行
      document.getElementById('myTable').deleteRow(1);
      var divInfo = document.getElementById('displayInfo');
      divInfo.innerHTML = "删除商品成功";
   }
   
   function updateRow() {  //更新行的信息
      var uRow = document.getElementById('myTable').rows[0];
      uRow.className = "title";
      
   }
   
</script>
</head>

<body>
<table border="0" cellpadding="0" cellspacing="0" id="mytable">
   <tr id="row1">
       <td>书名</td>
       <td>价格</td>
   </tr>
   <tr id="row2">
       <td>看得见风景的房间</td>
       <td class="center">$30.00</td>
   </tr>
    <tr id="row3">
       <td>60个瞬间</td>
       <td class="center">$32.00</td>
   </tr>
</table>
<input name="b1" type="button" value="增加一行" οnclick="javascript:addRow();"/><br />
<input name="b2" type="button" value="删除第二行" οnclick="javascript:delRow();"/><br />
<input name="b3" type="button" value="修改标题" οnclick="javascript:updateRow();"/><br />
<div id="displayInfo"></div>
</body>
</html>