how to put the input box and the label on top of input

1input, label {
2    display:block;
3}

1<form name="message" method="post">
2    <section>
3
4  <div style="float:left;margin-right:20px;">
5    <label for="name">Name</label>
6    <input id="name" type="text" value="" name="name">
7  </div>
8
9  <div style="float:left;">
10    <label for="email">Email</label>
11    <input id="email" type="text" value="" name="email">
12  </div>
13
14  <br style="clear:both;" />
15
16    </section>
17
18    <section>
19
20    <label for="subject">Subject</label>
21    <input id="subject" type="text" value="" name="subject">
22    <label for="message">Message</label>
23    <input id="message" type="text" value="" name="message">
24
25    </section>
26</form>