< html>
Cycle
function getSelectedButton(buttonGroup){
for (var i = 0; i < buttonGroup.length; i++) {
if (buttonGroup[i].checked) {
return i;
}
}
return 0;
}
function cycle(form) {
var i = getSelectedButton(form.sizes);
if (i+1 == form.sizes.length) {
form.sizes[0].checked = true;
} else {
form.sizes[i+1].checked = true;
}
}