本文介绍了一种使用JavaScript动态操作HTML表格的方法，通过添加和删除行来灵活管理表格内容。具体实现了当点击“新增”按钮时，在表格中增加一行，并且能够通过‘删除’按钮移除指定行。
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<script language="javascript">
function deleteRow(index){
var tableObj=document.getElementById("mytable");
tableObj.deleteRow(index);
}
function addRow(){
var tableObj=document.getElementById("mytable");
var newRowObj=tableObj.insertRow(tableObj.rows.length);
var newColName=newRowObj.insertCell(newRowObj.cells.length);
var newColAge=newRowObj.insertCell(newRowObj.cells.length);
var newColButton=newRowObj.insertCell(newRowObj.cells.length);
newColName.innerHTML=document.getElementById("newName").value;
newColAge.innerHTML=document.getElementById("newAge").value;
newColButton.innerHTML='<input type="button" value="删除" onclick="deleteRow('+(tableObj.rows.length-1)+')">';
}
</script>
</head>
<body>
<table width="100%" id="mytable" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>姓名</td>
<td>年龄</td>
<td>操作</td>
</tr>
<tr>
<td>gaoxiang</td>
<td>28</td>
<td><input type="button" onclick="deleteRow(0)" value="删除"/></td>
</tr>
<tr>
<td>gaoxiang</td>
<td>28</td>
<td><input type="button" onclick="deleteRow(1)" value="删除"/></td>
</tr>
</table>
<input type="text" name="name" id="newName" />
<input type="text" name="age" id="newAge"/>
<input type="button" onclick="addRow();" value="新增"/>
</body>
</html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<script language="javascript">
function deleteRow(index){
var tableObj=document.getElementById("mytable");
tableObj.deleteRow(index);
}
function addRow(){
var tableObj=document.getElementById("mytable");
var newRowObj=tableObj.insertRow(tableObj.rows.length);
var newColName=newRowObj.insertCell(newRowObj.cells.length);
var newColAge=newRowObj.insertCell(newRowObj.cells.length);
var newColButton=newRowObj.insertCell(newRowObj.cells.length);
newColName.innerHTML=document.getElementById("newName").value;
newColAge.innerHTML=document.getElementById("newAge").value;
newColButton.innerHTML='<input type="button" value="删除" onclick="deleteRow('+(tableObj.rows.length-1)+')">';
}
</script>
</head>
<body>
<table width="100%" id="mytable" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>姓名</td>
<td>年龄</td>
<td>操作</td>
</tr>
<tr>
<td>gaoxiang</td>
<td>28</td>
<td><input type="button" onclick="deleteRow(0)" value="删除"/></td>
</tr>
<tr>
<td>gaoxiang</td>
<td>28</td>
<td><input type="button" onclick="deleteRow(1)" value="删除"/></td>
</tr>
</table>
<input type="text" name="name" id="newName" />
<input type="text" name="age" id="newAge"/>
<input type="button" onclick="addRow();" value="新增"/>
</body>
</html>
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