I need to validate a phone number in javascript. The requirements are:
they should be 10 digits, no comma, no dashes, just the numbers, and not the 1+ in front
this is what I wrote so far
function validatePhone(field,alerttxt) {
with (field) {
if(value.length > 10) {
alert(alerttext);
return false;
}
for(i = 0; i < value.length; i++) {
if(parseInt(value[i]) == NaN) {
alert(alerttxt);
return false;
}
}
return true;
}
}
function validateForm(thisform) {
if (validatePhone(phone,"Invalid phone number")==false) {
phone.focus();
return false;
}
}
}
<form action="post.php" method="post" id="contactform" onsubmit="return validateForm(this)">
<ol>
<label for="phone">Your phone <span class="red"></span></label>
<input id="phone" name="phone" class="text" />
</li>
</ol>
</form>
but, obviously it doesn't work.
How can I write the validatePhone()
function so that it works?
phone = phone.replace(/[^0-9]/g, '');
if(phone.length != 10) {
alert("not 10 digits");
} else {
alert("yep, its 10 digits");
}
This will validate and/or correct based on your requirements, removing all non-digits.
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