The Code

<script>
function feardearg(obj,img)
{if (document.images)
{obj.src=img}}
</script>

<a href="http://MooseLoose.com"
onmouseover="feardearg(document.red, 'redb.jpg ')"
onmouseout="feardearg(document.red, 'redd.jpg ')">
<IMG SRC="redd.jpg " NAME="red" BORDER="0">
</a>

Explained

01 | <script>
02 | function feardearg(obj,img)
03 | {if (document.images)
04 | {obj.src=img}}
05 | </script>
06 |
07 | <a href="http://MooseLoose.com"
08 | onmouseover="feardearg(document.red, 'redb.jpg ')"
09 | onmouseout="feardearg(document.red, 'redd.jpg ')">
10 | <IMG SRC="redd.jpg " NAME="red" BORDER="0">
11 | </a>