How the custom frame functionality work on this website?

[Uzair]

Please have a look at this website...
http://www.eframe.co.uk/content/html/viewmamount.asp?ref=L0&TC=top3973&MC=mid372&BC=bot372&CH=mamstart&MP=3.07&BP=1.67&SP=2.68&widescreen=yes&mld=621348000&FW=31&withFrame=yes&IDS=S1&scaleto=0&BT=55&BB=55&BL=55&BR=55&IH=305&IW=254&OT=6&GB=25&MD=userDefined&CMCB=top&ops=&colours=&colourElements=&GP=0&CG=G1#

If you change any value on the right-side panel, frame changes its dimensions & settings. How does this work? Have they uploaded too many pictures for each size or they are using background repeat to create frame each time.

Somebody please guide me how this works...

Regards

[Spudhead]

It looks from the image src like they're generating a new one each time with those settings. But that page is nearly 10,000 lines long and I'm blowed if I'm wading through it to figure it out... :)

[Old Pedant]

Besides, it's an ASP page, and we can't see the ASP code that is hiding behind the scenes.

I *think* you *could* do this all in JavaScript code, but I'm not convinced this site is doing so. I suspect some ASP code that is generating custom images that are then downloaded into the page.