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Computing help - string length help!!!?
i have found this coding:
<script language="JavaScript1.2">
function checkpostal(){
var re4digit=/^\d{4}$/ //regular expression defining a 4 digit number
if (document.myform.myinput.value.search(re4digit)==-1) //if match failed
alert("Please enter a valid 4 digit number inside form")
}
</script>
<form name="myform">
<input type="text" name="myinput" size=15>
<input type="button" onClick="checkpostal()" value="check">
</form>
i'm supposed to add it to the following coding so the examination number will only be accepted when its 4 numbers long. how do it. here is the coding:
<html>
<head>
<title>Exam entry</title>
<script language="javascript" type="text/javascript">
function validateForm() {
var result = true;
var msg="";
if (document.ExamEntry.name.value=="") {
msg+="You must enter your name \n";
document.ExamEntry.name.focus();
document.getElementById('name').style.color="red";
result = false;
}
if (document.ExamEntry.subject.value=="") {
msg+="You must enter the subject \n";
document.ExamEntry.subject.focus();
document.getElementById('subject').style.color="red";
result = false;
}
if (document.ExamEntry.Examination_Number.value=="") {
msg+="You must enter the examination number \n";
document.ExamEntry.Examination_Number.focus();
document.getElementById('Examination_Number').style.color="red";
result = false;
}
if(msg==""){
return result;
}
{
alert(msg)
return result;
}
var re4digit=/^\d{4}$/ //regular expression defining a 4 digit number
if (document.ExamEntry.Examination_number.value.search(re4digit)==-1) //if match failed
alert("Please enter a valid 4 digit number")
}
</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>
<tr>
<td id="subject">Subject</td>
<td><input type="text" name="subject" /></td>
</tr>
<tr>
<td id="Examination_Number">Examination Number</td>
<td><input type="text" name="Examination_Number" /></td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Submit" onclick="return validateForm();" /></td>
<td><input type="reset" name="Reset" value="Reset" /></td>
</tr>
</table>
</form>
</body>
</html>
1 Answer
- 1 decade ago
I would like to say that you put it between the </head> and <body> , but im not a wiz at this! ^.^' Lemme know if it worked ;P
