List Object with Multi-Select?

Is there a way to set a list object (of any kind) to have multi-select on?
http://www.LB-Stuff.com/MMF2/List_Multi-Select.png
See, you can select more than one thing in the list object in that browser. [size:8pt](Specifically IE)[/size] Any ideas?

[size:8pt][BTW those are real IP adresses of spambots I have banned from my forum, so you can ban those as well if you have a forum][/size]

EDIT: Too bad - it's not possible to change the multi-selection property of an existing list box. :blush: