the thing is radio buttons do not work like select boxes.
say you have two different radiobuttons
i.e <input type="radio" name="rad1" value="1">
and <input type="radio" name="rad2" value="2">
then their values can be recieed by
document.formemail.rad1.value
and
document.formemail.rad1.value..
but say you have multiple radio buttons with same name
i.e <input type="radio" name="commonrad" value="1">
and <input type="radio" name="commonrad" value="2">
now this has become an array.
so then you have to run a loop to get the value..
i.e document.formemail.commonrad[0].value will give 1
and document.formemail.commonrad[1].value will give 2
also you will have to check first which one is checked.
to avoid all this i had put an hiddenfield and just assigned the value of the radio button checked so that it can be accessed in a single line of code...