按钮(Buttons).Bootstrap提供多种样式的按钮，同样是通过CSS的类来控制,包括btn, btn-primary, btn-info,btn-success等不同颜色的按钮，亦可以简单通过.btn-large .btn-mini等CSS的class控制按钮大小，能够同时用在<a>,<button>,<input>标签上，非常简单易用。如图2-6所示，不同颜色的按钮：
图2-6 按钮(Buttons)
Html代码 
<table class="table table-bordered table-striped">
<thead>
<tr>
<th>Button</th>
<th>class=""</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><button class="btn" href="#">Default</button></td>
<td><code>btn</code></td>
<td>Standard gray button with gradient</td>
</tr>
<tr>
<td><button class="btn btn-primary" href="#">Primary</button></td>
<td><code>btn btn-primary</code></td>
<td>Provides extra visual weight and identifies the primary action in a set of buttons</td>
</tr>
<tr>
<td><button class="btn btn-info" href="#">Info</button></td>
<td><code>btn btn-info</code></td>
<td>Used as an alternative to the default styles</td>
</tr>
<tr>
<td><button class="btn btn-success" href="#">Success</button></td>
<td><code>btn btn-success</code></td>
<td>Indicates a successful or positive action</td>
</tr>
<tr>
<td><button class="btn btn-warning" href="#">Warning</button></td>
<td><code>btn btn-warning</code></td>
<td>Indicates caution should be taken with this action</td>
</tr>
<tr>
<td><button class="btn btn-danger" href="#">Danger</button></td>
<td><code>btn btn-danger</code></td>
<td>Indicates a dangerous or potentially negative action</td>
</tr>
<tr>
<td><button class="btn btn-inverse" href="#">Inverse</button></td>
<td><code>btn btn-inverse</code></td>
<td>Alternate dark gray button, not tied to a semantic action or use</td>
</tr>
</tbody>
</table>