how to adress the object name and not the number?

[Tiemo Hollmann TB]

I think I have to stumble into every newbee pit and I think I have read a
similar thread, but don't find it anymore.

I have multiple images on a page which I gave numeric names to be able to
process them in loops (that was my thinking).

If I address theses images as:

set  the filename of image "1"  .

rev doesn't take the image with name 1, but number 1, though I put the 1
into apostrophe???

How can I force rev to take the image with name "1" or do I have to take
only alpha names?

Any hint appreciated

Tiemo