Passing a variable to a swf via a URL?

[Danger Madcow]

Let's say I have a swf with a variable name of "number" that I'd like to be able to set via the url, such as:

http://www.domain.com/page.html?number=4

How do I set up the swf/html to allow this?

Many thanks.

[nunomira]

hi,

Two examples:
Using javascript here.
Using php here.