I'm a newbie to Javascript and I need some information regarding the JavaScript.

1) Is it possible that we can use ActiveXObject("Scripting.FileSystemObject") on the Apple Mac for the purpose of opening, reading from and writing to a html file .

2) If not then how can we open, read and write to a file on both Windows and Apple Mac systems.

3) Is it possible that on clicking a button on some page, I can open or laod a new html document on the same page and then display some computed results on it.
I dont want to use window.open since it will open the page in another window.

It would be nice if I could get some code snippet or link for all of the above.

Thanks,
Rama

No, and you won't be able to do it on Windows either unless your user has very low security settings.
Non IE browsers can do the same things as IE on Windows but the security manager will prompt for file access. Search Google for PrivilegeManager.enablePrivilege.

Basically, unless you control the suers environment, let's say there are on a company intranet, you can't do this.
Yes, using DHTML look for innerHTML on Google

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Joe (Microsoft MVP - XML)