ummh... strange... in one computer the error appears, but i try my files in other computer (the same files) and it works fine, without error (in my friend's computer works fine too)... but if script is html and javascript and all computers are Windows XP IE6... i don't know what happens! Anyway, I try your files sadicq, it seems more cleaned. I will tell you if finally I can do it works fine. Thanks P.S.: AuxSetDescr doesn't work. The description is writed in wpi.htm, but in this file the desc is not described (is set in boxes.js), so the computer take the same program ID for all descriptions: the first (i=1).. because of this I define the descr.innerhtml div content into boxes.js.. is the only way I find this work P.S.S.: another thing.. I want that when an office program was checked, the microsoft office tools (herramientas de microsoft office) were checked too.. is this posible?