[shr-u] first impressions

[arne anka]

> Yes, a radio button with two options, or if you like, a set of two radio
> buttons.
>
> (*) a   ( ) b

would be a checkbox:
[ ]

while radiobuttons are to be used with a number >1, of which only one can  
be checked (which means, for every state you need +1 radiobutton),  
checkboxes can be used solitary and have two states.
by convention radiobuttons are round and checkboxes square, to make them  
easy distinguishable.