javascript - 通过 bool 值验证单选按钮？

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 bool 值来执行此操作，但我似乎无法执行它。有更好的方法吗？

这是我的按钮:

 <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

我认为你最好将两个 id 分配给两个单选按钮(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 {
        //
}