To enable javascript in Netscape 3+:
When you bring up Netscape you see a menubar atop the Netscape window. It will have: File Edit View Go Bookmarks Options Directory Window Help
You should use the mouse to click on Options. This will bring down a menu containing: General Preferences Mail and News Preferences Network Preferences Security Preferences etc.
You should click on Network Preferences. This will bring up the preferences window. There will be a bunch of tabs on top of the window. The last tab will be languages, click on that tab.
Then there will be two white boxes next to Enable Java and Enable JavaScript. Click on the box next to Enable JavaScript so it is checked or x'ed.