Ton Jense 9/26/2012 2:21:06 PM A matrix of checkboxes would solve only part of the problem. Another way could be to show two lists; one with the unselected options and a second one with the options already selected. In between the two lists, there are four buttons to - select one, - select all, - deselect one, - deselect all I think this solution would be complete foolproof, but much harder to realize.......
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