I'm pretty sure that you are new on this, so I'll explain some details:
Start getting jQuery up and running in a minute or less:
Insert this into your HTML (most commonly in the head, but you can throw it before the end body tag too):
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
Then place a script element after your jQuery one.
It will toggle the Style of your sentences.
<script>
$(function() {
$('.sentence').click(function() {
$(this).toggleClass('sentenceStyle');
});
});
</script>
Now you need to apply the Styles (CSS)
Placed a style element after your tag:
<style>
.sentenceStyle {
background-color: red;
color: white;
font-size: 14px;
}
</style>
Now you are ready to go! Here's the fiddle in case your get confused.