Quick examples:
1. height="20px", width="25px", etc - you can only use 'px' if you are using CSS.
2. <FONT style="
color:black;
family:arial;
font-size
x-small;">
</FONT>
Never use <font> tags, and if they aren't formatting anything (like this one) remove them.
3. <TABLE border="0" cellpadding="0" cellspacing="0" valign="top">
<FORM action="home.php" method="GET" name="sl_form">
Form tags need to go OUTSIDE of table tags.
Really pays to keep the code optimized, as you will have issues with some browers interpreting this code, particularly as the new ones roll out.