jquery-before-radio

var checkedValue;

var elements = document.getElementsByTagName('input');

for (var n = 0; n < elements.length; n++) {

    if (elements[n].type == 'radio' &&
        element[n].name == 'someRadioGroup' && 
        elements[n] == checked {

    checkedValue = elements[n].value;
    }

}