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2 つの関数の検証を行う方法。

フォームの正しい情報（名前、件名、番号）を入力した後、ラジオボタンをオフにして「success.html」に移動できるためです。

return関数と関係があることを知っています。

別の関数を検証する関数を持つことが可能かどうか疑問に思っていますか?

<head>
<title>Exam Entry</title>
<script language="javascript" type="text/javascript">

function validateForm() {
var result = true;
var msg="";

if (document.ExamEntry.name.value=="") {
msg+="You must enter your name \n";
document.ExamEntry.name.focus();
document.getElementById('name').style.color="red";
result = false;
}

if (document.ExamEntry.subject.value=="") {
msg+="You must enter your subject \n";
document.ExamEntry.subject.focus();
document.getElementById('subject').style.color="red";
result = false;
}

if (document.ExamEntry.examnumber.value=="") {
msg+="You must enter the examnumber \n";
document.ExamEntry.examnumber.focus();
document.getElementById('examnumber').style.color="red";
result = false;
}

if (document.ExamEntry.examnumber.value.length!=4) {
msg+="You must enter at least Four Numbers in the ExamNumber \n";
document.ExamEntry.examnumber.focus();
document.getElementById('examnumber').style.color="red";
result = false;
} 


var numbers = /^[0-9]{4}$/;


if (!(document.ExamEntry.examnumber.value.match(numbers))) {
    msg += "Only use numeric characters for the Examnumber \n";
    document.ExamEntry.examnumber.focus();
    document.getElementById('examnumber').style.color = "red";
    result = false;
}  


if(msg==""){
return result;
}
{
alert(msg)
return result;
}
}


function confirmation() {

var checked = null;
var inputs = document.getElementsByName('examtype');
for (var i = 0; i < inputs.length; i++) {
          if (inputs[i].checked) {
           checked = inputs[i];
   }
}
if(checked==null)
{
    alert('Please choose an exam level.');
    return false;
}
else{
     confirm('You have chosen '+checked.value+' is this correct?');
}

}




</script>
</head>


<body>
<h1>Exam Entry Form</h1>
<form name="ExamEntry" method="post" action="success.html">
<table width="50%" border="0">
<tr>
<td id="name">Name</td>
<td><input type="text" name="name" /></td>
<tr>
<td id="subject">Subject</td>
<td><input type="text" name="subject" /></td>
</tr>
<tr>
<td id="examnumber">Examination Number</td>
<td><input type="text" name="examnumber" maxlength="4" /></td>
</tr>
<tr>
<td><input type="radio" id="examtype" name="examtype" value="GCSE" /> : GCSE<br />
<td><input type="radio" id="examtype" name="examtype" value="A2" /> : A2<br />
<td><input type="radio" id="examtype" name="examtype" value="AS"/> : AS<br />
</tr>
<tr>
<td><input type="submit" name="Submit" value="Submit" onclick="confirmation();return validateForm

();"    />  </td>
<td><input type="reset" name="Reset" value="Reset" /></td>
</tr>
</table>
</form>
</body>
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