validate international phone number value

Wed Oct 26, 2011 12:17 am

Check an international phone number using JavaScript.

Code:: 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 = 6; function checkInternationalPhone(strPhone){ var bracket=3 if(strPhone.indexOf("+")>1) return false if(strPhone.indexOf("-")!=-1)bracket=bracket+1 if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false var brchr=strPhone.indexOf("(") if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false s=stripCharsInBag(strPhone,validWorldPhoneChars); return (isInteger(s) && s.length >= minDigitsInIPhoneNumber); }

Code:: 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; }

Code:: 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; }