Good afternoon. Many thanks, this solves the problem -- at least partially. The frames are `walking' now, but new problems appeared. I found that when I set `clickin=...', it is set it automatically to `clickout' as well, so one mouse click runs the JavaScript code twice. So I've set it this way: \definefieldstack[fgolds2] [sgolds1,sgolds2a,sgolds2b,sgolds2c,sgolds2d,sgolds2] [frame=off,option=,clickout=JS(Walk_Field{fgolds3}),clickin=] It's better, but I found that now frames are walking in a strange order. It is rather puzzling, since when it is invoked by \goto{...}[JS(...)], it works well. Moreover, it does different things at AdobeReader 7.x under Linux, and Acrobat 4.x under Windoze. Can you help me to solve it? Many thanks once more. M.K.