如何设置能让网页一打开就把光标定位在一个输入框中？如下面我的代码，我想让网页打开时光标默认定位在密码框中。<table width="359" height="140" border="0" align="center">
<tr>
<td width="77">用户名</td>
<td width="272"><input name="username" type="text" id="username" /></td>
</tr>
<tr>
<td>密码：</td>
<td><input name="userpass" type="password" id="userpass" /></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="添加" onclick="add()" />
<input type="submit" name="Submit2" value="取消" onclick="cancel(this)" /></td>
</tr>
</table>
<tr>
<td width="77">用户名</td>
<td width="272"><input name="username" type="text" id="username" /></td>
</tr>
<tr>
<td>密码：</td>
<td><input name="userpass" type="password" id="userpass" /></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="添加" onclick="add()" />
<input type="submit" name="Submit2" value="取消" onclick="cancel(this)" /></td>
</tr>
</table>
password .focus()
<body onload="document.getElementById('username').focus();"><table width="359" height="140" border="0" align="center">
<tr>
<td width="77">用户名 </td>
<td width="272"> <input name="username" type="text" id="username" /> </td>
</tr>
<tr>
<td>密码： </td>
<td> <input name="userpass" type="password" id="userpass" /> </td>
</tr>
<tr>
<td> </td>
<td> <input type="submit" name="Submit" value="添加" onclick="add()" />
<input type="submit" name="Submit2" value="取消" onclick="cancel(this)" /> </td>
</tr>
</table>
</body>
</html>
password .focus()
把这段代码加入onload事件中