How do I keep a form from making my table bigger?

I don’t really understand forms, but it seems to add some extra pointless space under the actual form. I attached a picture of my table with the form, and without it.

Anyone know how to get it so with the form the table stays the size of how it is without the form? What is causing that extra space and how do I get rid of it?

Here is the table code…

[CODE]<table width=’100%’ cellpadding=’0′ border=’0′ cellspacing=’0′>
<tr valign=’center’>
<td align=’left’ valign=’center’>
STUFF IN HERE
</td></tr></table>
[/CODE]

And here is the form code…

[CODE]<form method=”post”>
<select id=’postboxsmall’ name=”boardlevel” onchange=”jump(this.form)” >
<option></option>

<?php
$x = -1;

while ($x >= $topuserlevel)
{
$topstringtopass = “boardlevelcheck.php?boardlevel=” . $x;
?><option value='<?php echo $topstringtopass; ?>’ target=”_self” <?php if ($x == $_SESSION[‘boardlevel’]) { ?>selected<?php } ?>><?php echo $x; ?></option><?php
$x = $x-1;
}
?>
</form>[/CODE]

HALP!

[upl-file uuid=dfc799ee-c503-46d8-aec4-d25387a3e976 size=29kB]menubarimage.png[/upl-file]

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