How can I set Html object height same as window height?

Question

I have flash object embedded to my page and it should act as background animation. I have trouble setting height of object element, because firefox doesn't understand height="100%" value.

<object classid="my_class_id" width="100%" height="100%" id="my_id">

<blaa blaa />

</object>

Answer 1

I believe

html, body {
  height: 100%;
}

Should do it...

Answer 2

Have a look at the markup source of the example.

Fullscreen Flash as BG Example