Question

我有一个HTML页面，其中有许多部分包含RadioButtons和CheckBox的输入。他们中的第一个是这样的：

<div  style="margin-top: 30px; height: 270px;">
    <input id="Answer1" type="radio" name="Answers" title="True" onclick="setAnswered();"/>True<br/>
    <input type="radio" name="Answers" title="False" onclick="setAnswered();" />False
</div>
<div id="replaceAble1_a" style="display: none;">Answer1</div>

在最后输入之后，我正在寻找每个输入并调查是否检查了正确的答案。以下是执行此工作的脚本部分：

var ansList = document.getElementById(thisFrame + "_a").innerHTML.split(",");
for (var k = 0; k < ansList.length; k++) {
   var ele =  document.getElementById(ansList[k]);
   result = result & ele.checked ;
}

此迭代的thisFrame为replaceAble1。在调试时，很明显我在ansList[k]中获得了正确的元素ID，即Answer1。现在的问题是，每次Answer1是否已选中ele.checked都会返回false。可能是什么原因？

更新

我认为最好放完整代码。所以这就是：

<div id="replaceAble1">
    <span  style="font-size: 14pt ;margin-top: 5px;">Q 
        <span id ="question1">Do you live in Pakistan?</span>
    </span>
    <div  style="margin-top: 30px; height: 270px;">
        <input id="Answer1" type="radio" name="Answers" title="True" onclick="setAnswered();"/>True<br/>
        <input type="radio" name="Answers" title="False" onclick="setAnswered();" />False
    </div>
    <div id="replaceAble1_a" style="display: none;">Answer1</div>
    <div id="replaceAble1_n" style="display: none;">null</div>
</div>
<div id="replaceAble2" style="display: none;">
    <span  style="font-size: 14pt ;margin-top: 5px;">Q. 
        <span id ="question2">Do you go for cycling daily?</span>
    </span>
    <div  style="margin-top: 30px; height: 270px;">
        <input type="radio" name="Answers" title="True" onclick="setAnswered();" />True<br/>
        <input id="Answer2" type="radio" name="Answers" title="False" onclick="setAnswered();" />False
    </div>
    <div id="replaceAble2_a" style="display: none;">Answer2</div>
    <div id="replaceAble2_n" style="display: none;">null</div>
</div>
<div id="replaceAble3" style="display: none;">
    <span  style="font-size: 14pt ;margin-top: 5px;">Q 
        <span id ="question3">When Do you Sleep?</span>
    </span>
    <div  style="margin-top: 30px; height: 270px;">
        <input id="notAnswer1" type="checkbox" name="Answers" title="True" onclick="setAnswered();"/>Morning<br/>
        <input id="notAnswer2" type="checkbox" name="Answers" title="False" onclick="setAnswered();" />Evening<br/>
        <input id="Answer3" type="checkbox" name="Answers" title="False" onclick="setAnswered();" />Night                        
    </div>
    <div id="replaceAble3_a" style="display: none;">Answer3</div>
    <div id="replaceAble3_n" style="display: none;">notAnswer1,notAnswer2</div>
</div>
<div id="replaceAble4" style="display: none;">
    <span  style="font-size: 14pt ;margin-top: 5px;">Q 
        <span id ="question4">What Do you Eat?</span>
    </span>
    <div  style="margin-top: 30px; height: 270px;">
        <input id="Answer4" type="checkbox" name="Answers" title="False" onclick="setAnswered();" />Launch<br/>
        <input id="Answer5" type="checkbox" name="Answers" title="False" onclick="setAnswered();" />Break Fast<br/>
        <input id="Answer6" type="checkbox" name="Answers" title="False" onclick="setAnswered();" />Dinner<br/>
    </div>
    <div id="replaceAble4_a" style="display: none;">Answer4,Answer5,Answer6</div>
    <div id="replaceAble4_n" style="display: none;">null</div>
</div>

脚本是：

var i = 0;
var answered = false;
var score = 0;
var unitScore = 5;
var totalScore = 20;
var frameList = ["replaceAble1", "replaceAble2", "replaceAble3", "replaceAble4"];
function setAnswered() {
    answered = true;
}
function displayAnswer(isTimeUp) {
    var Message;
    var j;
    if (isTimeUp) {
        Message = "Times Up";
    } else {
        Message = "Quiz End";
    }

    for (j = 0; j < frameList.length; j++) {
        var result = true;
        var thisFrame = frameList[j];
        var ansList = document.getElementById(thisFrame + "_a").innerHTML.split(",");
        for (var k = 0; k < ansList.length; k++) {
            var ele =  document.getElementById(ansList[k]);
            result = result & ele.checked ;
        }
        ansList = document.getElementById(thisFrame + "_n").innerHTML.split(",");
        for (var k = 0; k < ansList.length; k++) {
            if (ansList[k] !== "null")
                result = result & (!document.getElementById(ansList[k]).checked);
        }
        if (result) {
            score = Number(score) + Number(unitScore);
        }
    }
    document.getElementById("QuestionPan").style.display = "none";
    document.getElementById("resultPan").style.display = "block";
    document.getElementById("message").innerHTML = Message;
    document.getElementById("totalMarks").innerHTML = totalScore;
    document.getElementById("score").innerHTML = score;
    var timetaken = count - document.getElementById("time").innerHTML;
    document.getElementById("timetaken").innerHTML = timetaken + " minutes";
}
function submition() {
    if (!answered) {
        alert("Please select at least one Answer for this question.");
        return;
    }
    if (i === (frameList.length - 1)) {
        displayAnswer(false);
        return;
    }
    document.getElementById(frameList[i++]).style.display = "none";
    document.getElementById(frameList[i]).style.display = "block";
    document.getElementById("counter").innerHTML = (Number(i) + 1) + '/' + frameList.length;
    answered = false;
}

只有第一个答案，即Answer1导致此问题。其他一切都很好。

Answer 1

您可能希望使用布尔&&运算符，而不是按位&运算符。

result = result && ele.checked;

这还取决于result的先前值。在这个阶段，我不完全确定这是你的问题。

更新

我无法重现这个问题。见http://jsfiddle.net/QA26Q/

我唯一的另一个想法是，您有多个单选按钮，其ID与本示例所示相同 - http://jsfiddle.net/QA26Q/1/。

Answer 2

遇到了问题。问题在于HTML而不是JavaScript。我错误地设置了所有输入的name字段，即Answer。因此，所有replaceable div中的所有单选按钮都属于同一组。因此，当我设置Answer2的{{1}}时，replaceable2的单选按钮会重置。看不见我无法追踪这个错误。所以我只是将html改为

replaceable1

它运作正常。

RadioButton总是返回false - JavaScript

2 个答案:

更新