根据单选按钮的布尔值进行验证

Question

我想避免使用for循环来验证一组单选按钮。我知道可以使用它们的布尔值来做这个，我只是无法执行它。有更好的方法吗?

这些是我的按钮:

 <form method="post" name="newUser" onsubmit="return proc()">
            First name:<br />
            <input type="text" id="fName" /><br />
            <div id="first_name_error"></div>
            Last name:<br />
            <input type="text" name="lName" /><br />
            <div id="last_name_error"></div>
            E-mail address:<br />
            <input type="text" name="eMail" /><br />
            <div id="email_error"></div>
            Gender:<input type="radio" name"sex" value="male" />Male
                    <input type="radio" name="sex" value="female" />Female<br />
                     <div id="gender_error"></div>

这是我的JS:

function proc(){
    var errmsg = "";
    if (document.forms["newUser"]["fName"].value == "")
    {
        document.getElementById('first_name_error').innerHTML = "*This field is required";
        document.getElementById('first_name_error').style.color = "red";
    }
    if (document.forms["newUser"]["lName"].value == "")
    {
        document.getElementById('last_name_error').innerHTML = "*This field is required";
        document.getElementById('last_name_error').style.color = "red";
    }
    if (document.forms["newUser"]["eMail"].value == "")
    {
        document.getElementById('email_error').innerHTML = "*This field is required";
        document.getElementById('email_error').style.color = "red";
    }
    if (document.forms["newUser"].sex == false)
    {
        document.getElementById('gender_error').innerHTML = "*Please select gender";
        document.getElementById('gender_error').style.color = "red";
    }
    return false;
}

Answer 1

我认为你最好为两个单选按钮分配两个id(例如radbtnMale, radbtnFemale)然后检查:

if (document.getElementById("radbtnMale").checked == false && document.getElementById("radbtnFemale").checked == false) {
        document.getElementById('gender_error').innerHTML = "*Please select gender";
        document.getElementById('gender_error').style.color = "red";
} else {
        //
}

Answer 2

Try this (jQuery):

if($('input[name=n]:checked').length==0){
    //error
}else{
    //OK
}