Problem with detail preview page

Hi,

I have a detail page which loads information from many different tables and categories.

Since the "num" becomes ambiguous (I think the "num" on the viewer refers to the category num I use for the navigation menu.), I manually set the permalink for each record.

The thing is, I am having problem with the "Preview" button.

Since the original url of the detail page is like this:

artistDetail.php?this_artist=9

the preview would not work properly, showing "no record found".

So, I set up a new button on the editor like this using the "separator" field, which I thought might be easier to deal with this problem.

<div class='col-sm-2'>
</div>
<div class='col-sm-10'>
<a href="/artistDetailPreview.php?this_artist=" target="_blank" ><div class="btn btn-primary">Use this preview button</div></a>
<br /><br />
</div>

but I need to get the record number at the end.

Is there a way to get the record num from the editor and post it in the url?

Thank you in advance,

Hiroko