function getElement(id) {
     return document.getElementById ? document.getElementById(id) : document.all ? document.all(id) : null;
}

/* Validation */

function validateEmail(entered) {
     apos=entered.indexOf("@");
     dotpos=entered.lastIndexOf(".");
     lastpos=entered.length-1;
     if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) {
          return false;
     } else {
          return true;
     }
}

function validateNumber(x) {
     var anum=/(^\d+$)|(^\d+\.\d+$)/;
     if (anum.test(x)){
          return true;
     } else {
          return false;
     }
}

/* Phone Number */
// 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);
}