You can do that by using page anchor.
Add a name on your a element:
Code:
<a href="tas_v08_01.html" target="_parent" name="#knop01"><img src="images/knoppen/voorjaar08_01_knop.jpg" alt="" /></a>
...and an onclick event to instruct the current page to load on that specific anchor name:
Code:
<a href="tas_v08_01.html" target="_parent" name="knop01" onclick="this.href=location.href+this.name;"><img src="images/knoppen/voorjaar08_01_knop.jpg" alt="" /></a>
This should go all the way to all your links.
Hope that makes sense.
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