function FiremniAkceInfoCheck() {
    if($('cf_info_akce').get('checked')) {
      $$('tr.cf_company').each(function(element,index) {
        element.setStyle('display', '');
      });
    } else {
      $$('tr.cf_company').each(function(element,index) {
        element.setStyle('display', 'none');
      });
    }
}

window.addEvent('domready', function() {
  FiremniAkceInfoCheck();
});
window.addEvent('domready', function() {
  $('cf_info_akce').addEvent('click', FiremniAkceInfoCheck);
});


window.addEvent('domready', function() {
  $('cf_form').addEvent('submit', function(e) {
    var alerttext = "";
    //email
    regExpPatternemail=/^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.(([0-9]{1,3})|([a-zA-Z]{2,3})|(aero|coop|info|museum|name))$/
    with (this.cf_email) {
    	  if (value==null || value=="")
    		    alerttext += "Povinná položka 'E-mail'.\n<br/>";
        }
    with (this.cf_name) {
    	  if (value==null || value=="")
    		    alerttext += "Povinná položka 'Jméno'.\n<br/>";
        }      
    if (this.cf_info_akce.checked) with (this.cf_company) {
    	  if (value==null || value=="")
            alerttext += "Povinná položka 'Společnost'.\n<br/>";
        }      
    if (alerttext.length > 0) {
        $('log').empty().set('html', '<div class="messageE"><p>' + alerttext + '</p></div>');
        return false;    
        }
  });
});