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Here’s how to validate US Zip code using JavaScript. We will be using a Regular Expression to do so.
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Validate US Zip Code in JavaScript</title>
<script type="text/javascript">
function IsValidZipCode(zip) {
var isValid = /^[0-9]{5}(?:-[0-9]{4})?$/.test(zip);
if (isValid)
alert('Valid ZipCode');
else {
alert('Invalid ZipCode');
}
}
</script>
</head>
<body>
<form>
<input id="txtZip" name="zip" type="text" /><br />
<input id="Button1" type="submit" value="Validate"
onclick="IsValidZipCode(this.form.zip.value)" />
</form>
</body>
</html>
The code above validates a US zip code based on both the five digit (12345) as well as nine-digit (12345-1234 ) schemes.
See a Live Demo
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comments
2 Responses to "Validate US Zip Code using JavaScript"Thanks for code!
home jobs
Nice, but it doesn't validate the actual zip code, just the xxxxx-xxxx.
PaaS for ISVs
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