[OU] Keyboard-only interaction with multiple select controls

[Benjamin Hawkes-Lewis]

Apparently, I can use Opera without a mouse:

http://www.opera.com/support/tutorials/nomouse/

But how do I select multiple non-adjacent options from an HTML SELECT 
control with the MULTIPLE attribute set using the keyboard only? The 
standard Windows keyboard shortcut is that ctrl+arrow keys move you 
through the list of options without changing your current selection, 
while ctrl+spacebar toggles selection for a given option:

http://msdn2.microsoft.com/en-us/library/bb545461.aspx

This works in Firefox on Windows, and something very similar (leave off 
the ctrl with spacebar) works on Firefox on Mac. It doesn't work in 
Internet Explorer, but there's a workaround:

http://support.microsoft.com/kb/265046

Neither works in Opera on Windows or Mac.

Here's a simple test case:

http://benjaminhawkeslewis.com/www/test-cases/multiple-select.php

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Benjamin Hawkes-Lewis