[ JQuery ] RADIO

if(!$(":input:radio[name=radioButtonName]:checked").val()) {
    alert("RADIO 버튼을 선택해주세요."); return;
}
 
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
if(!$(":input:radio[name=rMonthly]:checked").val()) {
    alert("월회비를 선택해주세요."); return;
} else {
    //alert($(":input:radio[name=rMonthly]:checked").val());
    if($(":input:radio[name=rMonthly]:checked").val() == "#" && form1.tMonthly.value == "") {
        alert("월회비를 입력해주세요."); 
        form1.tMonthly.focus();
        return;
    }
}