javascript find/delete

i've just started working with clearsilver and have very little 
experience programming.  i'm trying to make a clearsilver template 
that searches an HTML document "page.document.content", finds a table 
and deletes it each time someone looks at the page. (there may be a 
better way to do this, i.e. without tables)

i've added an HTML table at the bottom of our documents that users 
add/delete certain information so that i can filter the documents 
based on what was added or deleted in the table.  i don't want this 
information visible to people looking at the document, but i want it 
to exist on the backend so i can filter/search it.

The only thing i've been able to make work is the following .cs 
template:

backchop.cs
<?cs set:backchop = string.slice(page.document.content, 0, -515) ?>
<?cs var:backchop ?>

The problem is that when people add/delete the wrong amount of data, 
backchop deletes more than just the table and screws up the HTML.

Thanks - andy