asked on

Newbie Phone Validation

>Taller Mike, you provided me with a great regular >expression function:

function validatePhone( phoneNumber )
{
var objRegExp = /^\d{3}\-\d{4}$/;
return objRegExp.test(phoneNumber);
}

This will validate 3 digits, then a dash, then 4 digits. If you want to make the dash option, you would change the expression like so:

var objRegExp = /^\d{3}\-?\d{4}$/;

Either way, when you submit the form, you would validate the phone number by sending it's value to this function.

>Now I have one additional expression I would like to add >to this. Should the user desire NOT to enter the number >once the form phone input has focus and simply tab out, >how should I write the entire expression?

Thanks again

ASKER CERTIFIED SOLUTION

Michel Plungjan

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chimmi0912

Follwoing javascript validation will check the Domestic and Internation Phone numbers with valid characters and Delimiters like -,+,() and it won't accept the Phone number with less than 10 digits(Including Internationa and Domestic)

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{ var i;
for (i = 0; i < s.length; i++)
{
// Check that current character is number.
var c = s.charAt(i);
if (((c < "0") || (c > "9"))) return false;
}
// All characters are numbers.
return true;
}

function stripCharsInBag(s, bag)
{ var i;
var returnString = "";
// Search through string's characters one by one.
// If character is not in bag, append to returnString.
for (i = 0; i < s.length; i++)
{
// Check that current character isn't whitespace.
var c = s.charAt(i);
if (bag.indexOf(c) == -1) returnString += c;
}
return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}
var Phone=document.formname.Phone

if ((Phone.value==null)||(Phone.value=="")){
alert("Valid Phone Number with Area Code or Country Code");

}
else if (checkInternationalPhone(Phone.value)==false){
alert("Valid Phone Number with Area Code or Country Code");

}

strev

ASKER

Thanks, exactly what I needed...
Happy Holidays!