Forums Scripts & Popups Problem with simple script

I know what the issue is, but I'm not sure how to solve it. It only errors out sometimes, and this is because sometimes when I'm sending a script to test, I paste the whole thing and then decide I only need to send a few lines. I then delete all but about three lines, leaving the cursor on a blank line. The line count considers where the cursor is to be a line, but there's no text there, so it can't be set to a variable. How can I handle this so that it would check to make sure that there is something on that line before setting it to a variable? Thanks.

EDIT:

There is another problem. After I send someone a script, they don't get my queries that I send them.