These commands are for FP2003, but should be similar in all FP versions.
Open your web in FrontPage
Tools-Site Settings (may be Web Settings in earlier versions)
Advanced Tag
Check the box "Show hidden files and folders"
Click OK
You may get a message about refreshing the web - do so.
The _borders folder should now be visible in the file list and Folders
view.
In the _borders folder, open top.htm - this is your top border.
In Code (or HTML) view, find border="1", or autonumber=30 (whichever is
easier) and correct the border value.
You should also deal with that wide table Steve mentioned. In fact, you
seem to have nested 3 tables, where only one would do...
I would be tempted to rewrite the top border code as:
<body>
<div align="center"><img border="0" src="Book-holidays-banner-680.jpg"
width="680" height="128" alt="Book-Holidays"></div>
</body>