I used ctrl+c/ctrl+v to copy/paste your code to make sure I wouldn't make errors.
I do not have nested form tags. The form tag is before the outermost of nested tables and ends after the outermost table is closed. I have been searching the internet and found other scripts that address the iframe issue, stating that the script may need to be in the iframe referring back to the parent. I've had time to try a few with no positive results yet, but am still searching.
Thank you for your continued support.