/*
 *Atomo Computing Limited
 *
 * Simple validation functions 
 */

     function validateRegEx(regex, input, helpText, helpMessage) {
        // See if the input data validates OK
        if (!regex.test(input)) {
          // The data is invalid, so set the help message and return false
          if (helpText != null)
            helpText.innerHTML = helpMessage;
          return false;
        }
        else {
          // The data is OK, so clear the help message and return true
          if (helpText != null)
            helpText.innerHTML = "";
          return true;
        }
      }

      function validateNonEmpty(inputField, helpText) {
        // See if the input value contains any text
        return validateRegEx(/.+/,
          inputField.value, helpText,
          "*Required.");
      }

      function validateLength(minLength, maxLength, inputField, helpText) {
        // See if the input value contains at least minLength but no more than maxLength characters
        return validateRegEx(new RegExp("^.{" + minLength + "," + maxLength + "}$"),
          inputField.value, helpText,
          "Please enter a value " + minLength + " to " + maxLength +
          " characters in length.");
      }

/*   
   function validatePostcode(inputField, helpText) {
        // First see if the input value contains data
        if (!validateNonEmpty(inputField, helpText))
          return false;

        // Then see if the input value is a ZIP code
        return validateRegEx( GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW]) [0-9][ABD-HJLNP-UW-Z]{2},
          inputField.value, helpText,
          "Please enter a 9-digit Postcode code.");
      }
*/
      function validateDate(inputField, helpText) {
        // First see if the input value contains data
        if (!validateNonEmpty(inputField, helpText))
          return false;

        // Then see if the input value is a date
        return validateRegEx(/^\d{2}\/\d{2}\/(\d{2}|\d{4})$/,
          inputField.value, helpText,
          "Please enter a date (for example, 01/14/1975).");
      }

      function validatePhone(inputField, helpText) {
        // First see if the input value contains data
        if (!validateNonEmpty(inputField, helpText))
          return false;

        // Then see if the input value is a phone number
        return validateRegEx(/^\d{3}-\d{3}-\d{4}$/,
          inputField.value, helpText,
          "Please enter a phone number (for example, 123-456-7890).");
      }

      function validateEmail(inputField, helpText) {
        // First see if the input value contains data
        if (!validateNonEmpty(inputField, helpText))
          return false;

        // Then see if the input value is an email address
        return validateRegEx(/^[\w\.-_\+]+@[\w-]+(\.\w{2,3})+$/,
          inputField.value, helpText,
          "Please enter an valid email address.");
      }