CSS justify

To justify text you'll have to use the style text-align with the attribute justify .
You can accomplish this in the HTML tag:
<div style="text-align:justify">.. your text here </div>
You can also create an entry in the heading of your page or in a separate CSS file:

<style type="text/css">
DIV.block {text-align:justify}
... your other stiles here
</style>

With this code you create a class block that can be used by the tag <div>
<div class="block">.. your text here </div> will have the same effect as <div style="text-align:justify">.. your text here </div>