HTML5 给input和textarea HTML标签增加 prompt
下面的例子展示了，如何给INPUT和TEXTAREA标签通过设置attribute。
<!DOCTYPE html>
<html>
<body>
<table>
<tr>
<th>Username:</th>
<td><input id="usrnm" type="email" name="username" placeholder="[email protected]" /></td>
</tr>
<tr>
<th>Password:</th>
<td><input id="psswd" type="password" name="password" placeholder="Top secret password" /></td>
</tr>
<tr>
<th>Comments:</th>
<td><textarea id="cmmnts" cols="30" rows="5" placeholder="Comments"></textarea></td>
</tr>
<tr>
<td> </td>
<td><input id="submitBtn" type="submit" value="Submit" /></td>
</tr>
</table>
</body>
</html>源码下载：
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