widget only on one page.

[Lynne]

And that is what you would be doing if you put and if condition around it based on the nodeid.

I don't know where you are evaling that template. It's not a default template. Since you said it's an html widget, I'd guess in the widget/static.php file. I'm thinking you are going to have to just go with $_GET[r] (r is in the browser url of the page)