/*
Email Transmit Functions
*/

    function isValidEmail(address) {
      if (address.indexOf('@') < 3) return false;
      var name = address.substring(0, address.indexOf('@'));
      var domain = address.substring(address.indexOf('@') + 1);
      if (name.indexOf('(') != -1 || name.indexOf(')') != -1 || name.indexOf('<') != -1 || name.indexOf('>') != -1 || name.indexOf(',') != -1 || name.indexOf(';') != -1 || name.indexOf(':') != -1 || name.indexOf('\\') != -1 || name.indexOf('"') != -1 || name.indexOf('[') != -1 || name.indexOf(']') != -1 || name.indexOf(' ') != -1) return false;
      if (domain.indexOf('(') != -1 || domain.indexOf(')') != -1 || domain.indexOf('<') != -1 || domain.indexOf('>') != -1 || domain.indexOf(',') != -1 || domain.indexOf(';') != -1 || domain.indexOf(':') != -1 || domain.indexOf('\\') != -1 || domain.indexOf('"') != -1 || domain.indexOf('[') != -1 || domain.indexOf(']') != -1 || domain.indexOf(' ') != -1) return false;
      return true;
    }

    function trimWhitespace(string) {
      var newString  = '';
      var substring  = '';
      beginningFound = false;

      // copy characters over to a new string
      // retain whitespace characters if they are between other characters
      for (var i = 0; i < string.length; i++) {

      // copy non-whitespace characters
      if (string.charAt(i) != ' ' && string.charCodeAt(i) != 9) {

        // if the temporary string contains some whitespace characters, copy them first
        if (substring != '') {
          newString += substring;
          substring = '';
        }
        newString += string.charAt(i);
        if (beginningFound == false) beginningFound = true;
      }

      // hold whitespace characters in a temporary string if they follow a non-whitespace character
      else if (beginningFound == true) substring += string.charAt(i);
      }
      return newString;
    }

    function checkFields() {
      var errstr = "";

      if (trimWhitespace(document.inputform.firstname.value).length == 0) {
        errstr += "- first name\r\n";
      }
      if (trimWhitespace(document.inputform.lastname.value).length == 0) {
        errstr += "- last name\r\n";
      }
      if (!isValidEmail(document.inputform.email.value)) {
        errstr += "- valid email address\r\n";
      }

       if (errstr.length == 0) {
         document.inputform.submit();
         return true;
       } else {
         alert("Please enter information in the following fields:\r\n" + errstr);
         return false;
       }
     }