I have searched the forum but could not find any topic or hint matches my question. I hope I am creating this topic at correct part of the forum.

I have a page (say main.html) with a inline frame. I have also many other pages (say design1.html, design2.html, design3.html) to fit that inline frame at the main.html.

All I need is find a way to force the main.html to show up with any of those design1.html or design2.html or deisgn3.html etc.

Because, sometimes I wish to redirect the customers to a particular design via external link.

I hope I could describe my intend well.

Is there a way to do it?