function validate(frm) {
  var value = '';
  var errFlag = new Array();
  _qfMsg = '';

  value = frm.elements['Y_name'].value;
  if (value == '' && !errFlag['Y_name']) {
    errFlag['Y_name'] = true;
    _qfMsg = _qfMsg + '\n - Name -- обязательное поле';
  }

  value = frm.elements['Y_email'].value;
  if (value == '' && !errFlag['Y_email']) {
    errFlag['Y_email'] = true;
    _qfMsg = _qfMsg + '\n - Email -- обязательное поле';
  }

  value = frm.elements['Y_text'].value;
  if (value == '' && !errFlag['Y_text']) {
    errFlag['Y_text'] = true;
    _qfMsg = _qfMsg + '\n - Message -- обязательное поле';
  }

  value = frm.elements['Y_email'].value;
  var regex = /^((\"[^\"\f\n\r\t\v\b]+\")|([\w\!\#\$\%\&'\*\+\-\~\/\^\`\|\{\}]+(\.[\w\!\#\$\%\&'\*\+\-\~\/\^\`\|\{\}]+)*))@((\[(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))\])|(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))|((([A-Za-z0-9\-])+\.)+[A-Za-z\-]+))$/;
  if (value != '' && !regex.test(value) && !errFlag['Y_email']) {
    errFlag['Y_email'] = true;
    _qfMsg = _qfMsg + '\n - Ваш Email - неверное значение';
  }

  if (_qfMsg != '') {
    _qfMsg = 'Invalid information entered.' + _qfMsg;
    _qfMsg = _qfMsg + '\nPlease correct these fields.';
    alert(_qfMsg);
    return false;
  }
  return true;
}