<input type="radio" class="ridio-box" checked="" value="0" name="monitorType"> A <input type="radio" class="ridio-box" value="1" name="monitorType"> B
$('input[type=radio][name=monitorType]').change(function() {
var monitorType=$("input[type='radio'][name='monitorType']:checked").val();
if(monitorType==0){
//aaaa
}
else{
//bbbb
}
});