Falls der erste Vorschlag in die Hose ging. ;-)
arra = new Array('art', 'nächstes Radio');
for (i = 0; i < arra.length; i++)
{
for (b = 0; b < 5; b++)
{
if (document.form_name.elements[arra[i]][b].checked == true)
{
// mach was
}
}
}