The Code

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

<a href="http://MooseLoose.com"
onmouseover="
MoooseLooose(document.rrr, 'red.jpg'),
MoooseLooose(document.ggg, 'red.jpg'),
MoooseLooose(document.bbb, 'red.jpg')
",
onmouseout="
MoooseLooose(document.rrr, 'red.jpg'),
MoooseLooose(document.ggg, 'green.jpg'),
MoooseLooose(document.bbb, 'blue.jpg')
">
<IMG SRC="red.jpg" NAME="rrr" BORDER=0>
</a>

<a href="http://MooseLoose.com"
onmouseover="
MoooseLooose(document.rrr, 'green.jpg'),
MoooseLooose(document.ggg, 'green.jpg'),
MoooseLooose(document.bbb, 'green.jpg')
",
onmouseout="
MoooseLooose(document.rrr, 'red.jpg'),
MoooseLooose(document.ggg, 'green.jpg'),
MoooseLooose(document.bbb, 'blue.jpg')
">
<IMG SRC="green.jpg" NAME="ggg" BORDER=0>
</a>

<a href="http://MooseLoose.com"
onmouseover="
MoooseLooose(document.rrr, 'blue.jpg'),
MoooseLooose(document.ggg, 'blue.jpg'),
MoooseLooose(document.bbb, 'blue.jpg')
",
onmouseout="
MoooseLooose(document.rrr, 'red.jpg'),
MoooseLooose(document.ggg, 'green.jpg'),
MoooseLooose(document.bbb, 'blue.jpg')
"><IMG SRC="blue.jpg" NAME="bbb" BORDER=0>
</a>

Explained

01 | <script>
02 | function MoooseLooose(obj,img)
03 | {if (document.images)
04 | {obj.src=img}}
05 | </script>
06 |
07 | <a href="http://MooseLoose.com"
08 | onmouseover="
09 | MoooseLooose(document.rrr, 'red.jpg'),
10 | MoooseLooose(document.ggg, 'red.jpg'),
11 | MoooseLooose(document.bbb, 'red.jpg')
12 | ",
13 | onmouseout="
14 | MoooseLooose(document.rrr, 'red.jpg'),
15 | MoooseLooose(document.ggg, 'green.jpg'),
16 | MoooseLooose(document.bbb, 'blue.jpg')
17 | ">
18 | <IMG SRC="red.jpg" NAME="rrr" BORDER=0>
19 | </a>
20 |
21 | <a href="http://MooseLoose.com"
22 | onmouseover="
23 | MoooseLooose(document.rrr, 'green.jpg'),
24 | MoooseLooose(document.ggg, 'green.jpg'),
25 | MoooseLooose(document.bbb, 'green.jpg')
26 | ",
27 | onmouseout="
28 | MoooseLooose(document.rrr, 'red.jpg'),
29 | MoooseLooose(document.ggg, 'green.jpg'),
30 | MoooseLooose(document.bbb, 'blue.jpg')
31 | ">
32 | <IMG SRC="green.jpg" NAME="ggg" BORDER=0>
33 | </a>
34 |
35 | <a href="http://MooseLoose.com"
36 | onmouseover="
37 | MoooseLooose(document.rrr, 'blue.jpg'),
38 | MoooseLooose(document.ggg, 'blue.jpg'),
39 | MoooseLooose(document.bbb, 'blue.jpg')
40 | ",
41 | onmouseout="
42 | MoooseLooose(document.rrr, 'red.jpg'),
43 | MoooseLooose(document.ggg, 'green.jpg'),
44 | MoooseLooose(document.bbb, 'blue.jpg')
45 | ">
46<IMG SRC="blue.jpg" NAME="bbb" BORDER=0>
47 | </a>