In parent window, how to call a function definded in an <iframe>

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9:39 am on Sep 14, 2005 (gmt 0)

For example, here is the parent window:

<html>
...
<iframe id="sub_frame" src="sub_frame.html"></iframe>
...
<script type="text/javascript">
</script>
</html>

And this is sub_frame.html

<html>
...
<head>
<script type="text/javascript">
</script>
</head>
</html>

And how to write test_function() to call sub_function from parent window?

I tried

function test_function()
{
document.getElementById('sub_frame').sub_function();
}

but it does not work.

12:02 pm on Sep 14, 2005 (gmt 0)

Give the frame a name and an id - both identical.

window.frames._frameNameOrId_.functionName()