php 表单上单选按钮的 javascript 验证问题 [英] Issues with javascript validation of radio buttons on php form

问题描述

这是包含带有单选按钮的表单的 php 文件的代码:

This is the code for the php file containing the form with radio buttons:

<?php
    while($r7 = mysql_fetch_array($rt3)){
        $name=$r7["name"];  
        $s=$r7["question"]; 

        echo "
        <div>$s</div>

        <form name='Tester' method='post' onSubmit='return RegValidate(this);' action='quest.php' >
        <input type='radio' name='w1' value='1'>1<br>
        <input type='radio' name='w1' value='2'>2<br>
        <input type='radio' name='w1' value='3'>3<br>



        ";
        }
        echo" <input  name='Submit' value='Tester' type='submit' />
        </form>";

?>

$name 和 $q 来自使用 mysql 查询的数据库.这工作正常.到目前为止，我已经使用了以下 javascript 代码:

The $name and $q are derived from the database using a mysql query. This works fine. I have used the following javascript code so far:

function RegValidate(Tester) 
 {

 if($('#w1').not(':checked'))
{
   alert('Radio not checked');
   return false;
}

}

但是使用此代码，我继续收到错误消息，即使我选择了一个单选按钮，我也无法继续.

But with this code, I continue to get the error message, and I am not able to move on even though I have selected a radio button.

while 循环生成多组单选按钮，如 $q，从数据库中获取问题并将其与 3 个单选按钮一起发布到页面上.每个问题 $q，上面都有 3 个单选按钮，这就是 $name 的原因.

The while loop produces several sets of radio buttons, as $q, gets the question from the database and posts it on the page along with 3 radio buttons. Each question $q, has the 3 radio buttons in the above, hence the reason for the $name.

如何使用 javascript 验证此表单.注意.该表单将仅包含单选按钮.

How do I validate this form with javascript. NB. The form will only contain radio buttons.

推荐答案

function RegValidate(Tester) {
    if ($(":radio[name=w1]:checked").toArray().length == 0) {
        alert('nothing selected');
        return false;
    }
}​

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