How to put alt=”text here” in the code inside???

Example site: http://www.happyvagabonds.ms/fo.tog.ra.fie/

The main picture is basically a nav link that takes the viewer to the previous post. I would like to add some text such as: Click here for previous post.

Following is the code that controls the content:


<div class="storycontent">
<dl class="sized"><dd>
<a href="<?php echo next_pics_link() ?>">
<?php
ob_start("callback");
the_content();
ob_end_flush();
?>
</a>
</div>


I looked at the properties for the picture and the alternate text was shown as </dd

I have tried several different inserts with no luck.

help? :o)