I am using php to link to a menu.html file that includes my navigation menu with javascript rollovers. It shows up fine in Safari and Firefox, but not at all in IE and Opera. Here are the codes:

PHP:

<!--Menu -->

<div class="menu">
<?php require("http://www.daltonridenhour.com/php/menu.html"); ?>
</div>

CSS:

.menu {
position: absolute;
top: 500px;
left: 170px;
}
.menu a:link {
color: #FFFFFF;
}
.menu a:visited {
color: #FFFFFF;
}

HTML file linked to by PHP:

<a href="index.php3"
onmouseover="document.home.src='/images/home-over.jpg'"
onmouseout="document.home.src='/images/home.jpg'"
<img src="/images/home.jpg" alt="home" name="home" width="50" height="22" /></a>
<a href="bio.php3"
onmouseover="document.bio.src='/images/bio-over.jpg'"
onmouseout="document.bio.src='/images/bio.jpg'"
<img src="/images/bio.jpg" alt="bio" name="bio" width="36" height="22" /></a>
<a href="events.php3"
onmouseover="document.events.src='/images/events-over.jpg'"
onmouseout="document.events.src='/images/events.jpg'"
<img src="/images/events.jpg" alt="events" name="events" width="61" height="22" /></a>
<a href="media.php3"
onmouseover="document.media.src='/images/media-over.jpg'"
onmouseout="document.media.src='/images/media.jpg'"
<img src="/images/media.jpg" alt="media" name="media" width="52" height="22" /></a>
<a href="gallery.php3"
onmouseover="document.gallery.src='/images/gallery-over.jpg'"
onmouseout="document.gallery.src='/images/gallery.jpg'"
<img src="/images/gallery.jpg" alt="gallery" name="gallery" width="59" height="22" /></a>
<a href="links.php3"
onmouseover="document.linkstry.src='/images/linkstry-over.jpg'"
onmouseout="document.linkstry.src='/images/linkstry.jpg'"
<img src="/images/linkstry.jpg" alt="links" name="linkstry" width="47" height="22" /></a>
<a href="contact.php3"
onmouseover="document.contact.src='/images/contact-over.jpg'"
onmouseout="document.contact.src='/images/contact.jpg'"
<img src="/images/contact.jpg" alt="contact" name="contact" width="66" height="22" /></a>

Any reason why this would work in Safari and Firefox, but not in Opera and IE? Thanks a lot for your help.