Phone number validation is an important part of validating an HTML form. On this artilce we will discussed how to validate a phone number in javascript. We made Phone number validation example after lots of trial, help using regular expression.
We solve this format. xxx-xx-xxxxxx
Notes : Fresher Need To Understand Regular Expression.
<script type="text/javascript">
function ValidateForm(){
var ValidString = document.forms["myform"]["txtPhone"].value;
var regexObj = /^(?([0-9]{3}))?[-. ]?([0-9]{2})[-. ]?([0-9]{8})$/;
if (regexObj.test(ValidString)) {
var formattedPhoneNumber =
subjectString.replace(regexObj, "($1) $2-$3");
alert("Success");
} else {
alert("Invalid phone number");
return false;
}
}
</script>
<body>
<form id="myform" name="myform" method="POST" action="" onsubmit="return ValidateForm();">
<input type="text" name="txtPhone" id="txtPhone">
<input type="submit" name="submit" id="submit" value="I Agree">
</form>
</body>
