function Validate() {}
Validate.prototype.isOnlyNumeric = function(string)
{
  var invalidCharactersRegExp = /[^\d]/;
  var isValid = !(invalidCharactersRegExp.test(string));
  return isValid;
}
Validate.prototype.isOnlyAlphabetic = function(string)
{
  invalidCharactersRegExp = /[^a-z ]/i;
  var isValid = !(invalidCharactersRegExp.test(string));
  return isValid;
}
Validate.prototype.isValidEmail = function(email)
{
  var validFormatRegExp = /^\w(\.?[-\w])*@\w(\.?[-\w])*\.([a-z]{3}(\.[a-z]{2})?|[a-z]{2}(\.[a-z]{2})?)$/i;
  var isValid = validFormatRegExp.test(email);
  return isValid;
}
Validate.prototype.isValidDate = function(day, month, year)
{
  var isValid = true;
  var enteredDate = new Date(day + " " + month + " " + year);
  if (enteredDate.getDate() != day)
  {
	  isValid = false;
  }
  return isValid;
}