I developed a script to vaildate input from a user. It works fine in Explorer, but Netscape ignores it. Any ideas?

Byron has over 15 years of Technical Support Experience with expertise on Windows, Apple devices , Android, Virus Removal, Cloud Computing, Email Configuration, Smartphones, Facebook, Instagram, Kindle, Twitter,Dropbox, Linkedin, Printer configurations and Networking. He has worked for some of the top computer manufacturers in the world and has served as a Subject Matter Expert for Level 1 and 2 technicians providing assistance in resolving advance technical issues. Byron holds a degree in Electronics and Communications Engineering with a DSCE and CCNA certification.