text: function _es_submit() {
  	if(document.es_form.es_cron_mailcount.value == "") {
  		alert(es_cron_notices.es_cron_number);
  		document.es_form.es_cron_mailcount.focus();
  		return false;
  	} else if(isNaN(document.es_form.es_cron_mailcount.value)) {
  		alert(es_cron_notices.es_cron_input_type);
  		document.es_form.es_cron_mailcount.focus();
  		return false;
  	}
  }