function isSelected(field) {
  selected = field.selectedIndex;
  selected = field.options[selected].value;

  if (selected != "" && selected != null) {
    return true;
  }
  else {
    return false;
  }
}

function isFilled(field) {
  if (field.value != "" && field.value != null) {
    return true;
  }
  else {
    return false;
  }
}

function isEmail(field) {
  if (field.value.indexOf("@") == "-1" ||
      field.value.indexOf(".") == "-1" ||
      field.length == 2 ||
      field.value == null ||
      field.value == "") {
    return false;
  }
  else {
    return true;
  }
}
function isPhone(field) {
  if (field.length == 12 ||
      field.value == null ||
      field.value == "") {
    return false;
  }
  else {
    return true;
  }
}

function isChecked(field) {
  var checkon = ""
  for (i=0; i < field.length; i++) {      
    if (field[i].checked=="1") {
      checkon=field[i].value
    }
  }
   
  if (checkon != "") {
    return true;
  }
  else {
    return false;
  }
}

function isValidPassword(field) {
  if (field.value == null ||
      field.value == "" ||
      field.value.length < 8) {
    return false;
  }
  else {
    return true;
  }
}