Load html containing scripts

[charlie imac]

I have a question on the capability of Ajax. My question is: Is it
possible to dynamically load any of the javascript gallery programs
such as:

Adobe Spry Gallery
SmoothGallery
others

I know using ExtJS I can load html using Ajax. What I can't do is load
html containing scripts. I didn't want to use IFRAME. I've looked at
other JavaScript Frameworks but have not found one that works the way I
want. Does anyone know if this is possible? If so, how?

I mostly make websites for artists and photographers using Flash. I
was wanting to move away from Flash.

thanks,
charlie-imac