radio button help

Hi ! I know that this may be not the right place for this question, bu anyway: The radiobutton tag looks like this: <input type="radio" name="radiobutton" value="radiobutton"> How am I suposed to handle multiple buttons(what should I change, name or the value?) My point here is: Does the buttons with the same name return defined values for one variable(the $name of selected button = "its value), or buttons with different names should have a boolean value , 0 or 1, depends on weather they have been selected or not($name1 = 0, $name2 = 0, $name3 = 1, vhere name3 is selected) ? Thanks Nikola