Media Semantics Javascript actionShow not working

I'm stuck. . . I'm trying to get my "Next" button to appear after the .mpr is finished, but the file is too complicated to use an action when done playing; instead, the .mpr file requires javascript. I'm using using a Media Semantics Character and, per their instructions, added to the script a URL command with javascript. It tries to open a page in preview mode, so have been publishing each test with no more than an error on the page when the URL command plays.

Here's the javascript. . . "javascript:NextGreen.actionShow()" The second field is blank per their instructions too.

NextGreen is the name of the button, but the image is Next001.gif. . . . do I need to use that instead? If so, with the".gif?" I've tried copying it from the inherent list to the page itself, publishing to html, with no better results. I tried "javascript:trivNextPage() and it works, so I know the actionShow should work in thoery.

I'm not a programmer, so I rely on copy & paste. . . any help would be much appreciated.

Thanks,

Tim