I have a list of links, each one beginning with a linked image that takes the visitor who clicks it to a particular page. When they click the back button, they are presented with the same list, but may have forgotten where they are in the list. I would like the image they just clicked on to change to one of a different color so that they can see where they were on the list when they return to it.

These are the 2 images that will be linked to a document:

Here is the current code and CSS, which does not use the second image:
.inlineimg { vertical-align: middle; }

<a href="address_of_document"><img class="inlineimg" src="imgdir/firstnew.gif" alt="" border="0" /></a>
I am not concerned about whether the image changes when hovered, only when clicked. Can you help me with the CSS and HTML?

Thank you,