Flash-JS issues

Hello everyone,

I’m puzzled about this:

I have a website on a CD rom (html+flash+quicktime VR). I’m using getURL(javascript:nameofJSFunction()) to call a js function in the html (for navigation purposes). It seems like it does not work on some machines (or so I’ve been told).
Any suggestions aside from checking if the browser if javascript enabled?
Should I use FS command instead?
I’ve been told that some PCs with XP and explorer 6 do not execute the JS function.
It might be how I wrote the Javascript (flash, navigation and content are in different frames):

function loadPage(nav,videoPage)
{
parent.mainFrame.document.location=videoPage;
parent.nav.document.location=nav;
}
function changePlanet2(top,video,nav){
parent.menu.document.location = top;
parent.mainFrame.document.location=video;
parent.nav.document.location=nav;
}
function changePlanet(video,nav){
parent.mainFrame.document.location=video;
parent.nav.document.location=nav;
}

Thanks.