取消按钮无法确认画面

Question

我试图验证在JavaScript单选按钮，这是我的代码：

if (document.ExamEntry.GCSE.checked == true) { 
    confirm("You have selected GCSE. Is this correct?"); 
} 
if (document.ExamEntry.AS.checked == true) { 
    confirm("You have selected AS. Is this correct?"); 
} 
if (document.ExamEntry.A2.checked == true) { 
    confirm("You have selected A2. Is this correct?"); 
} 

确认画面显示出来，然后点击“提交”，成功地把你带到下一个页面，但取消按钮似乎不起作用 - 当我希望它保留在页面上时，它会将您带到下一页，以便您可以更改选项。

我尝试过的东西，如返回结果; 结果= false

他们要么不工作，要么他们这样做，反之亦然，这样取消按钮的工作方式就是停留在同一页面上，但这也会发生在提交按钮上。

Answer 1

var gcse = true, 
    as = true, 
    a2 = true; 

if (document.ExamEntry.GCSE.checked == true) { 
    gcse = confirm("You have selected GCSE. Is this correct?")); 
} 

if (document.ExamEntry.AS.checked == true) { 
    as = confirm("You have selected AS. Is this correct?"); 
} 

if (document.ExamEntry.A2.checked == true) { 
    a2 = confirm("You have selected A2. Is this correct?"); 
} 

if (gcse && as && a2) { 
    // you're golden 
    window.location.href = 'otherpage' 
} 

Answer 2

查看confirm的文档。它说，

结果是指示是否正常或选择取消（true表示OK）一个布尔值

这意味着每个线路都应该检查返回值。简明的方式来做到这一点，例如：

if (!confirm("You have selected A2. Is this correct?")) { 
    // event.cancel = true, or whatever you need to do on your side to cancel 
} // otherwise fall through and do what you're doing. 

因为它是现在，因为你从来不看的confirm返回值，所以你总是通过你的“成功”的情况下下降。

Answer 3

if (document.ExamEntry.GCSE.checked == true) { 
    if(confirm("You have selected GCSE. Is this correct?")) { 
     // do something 
    } 
} if (document.ExamEntry.AS.checked == true) { 
    if(confirm("You have selected AS. Is this correct?")) { 
     // do something 
    } 
} 
if (document.ExamEntry.A2.checked == true) { 
    if(confirm("You have selected A2. Is this correct?")) { 
     //do something 
    } 
}