function checkEmail(){
    re = new RegExp("^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}$");
    if (!re.test(document.getElementById("email").value)) {
      window.alert("Emailová adresa nemá správný formát / The email adress is invalid");
      return false;
    } else {
    return true;
    }
}

$( function() {

			
			$( '.plat' ).live( 'change', function() {
		   	if($('.plat :selected').text()=='hotově' || $('.plat :selected').text()=='cash'){
           
           $(".apl").remove();
           
         } else {
         
           $(".apl").remove();
           $('.dop').append("<option value='doporučený dopis' class='apl'>"+$('.bl').text()+"</option>");
         
         }
      });


		});
		
                $(function () {
                        var tabContainers = $('div.tabs > div');
                        tabContainers.hide().filter(':first').show();
                        
                        $('div.tabs ul.tabNavigation a').click(function () {
                                tabContainers.hide();
                                tabContainers.filter(this.hash).show();
                                $('div.tabs ul.tabNavigation a').removeClass('selected');
                                $(this).addClass('selected');
                                return false;
                        }).filter(':first').click();
                });


$(document).ready(function() {

                        $('.order_ticket_cz').hover(function () {
                                $(this).attr('src', 'http://www.pragueproms.cz/layout/order_a.jpg'); 
                                },function () {
                                $(this).attr('src', 'http://www.pragueproms.cz/layout/order.jpg');
                                }
                );
                
                              $('.order_ticket_en').hover(function () {
                                $(this).attr('src', 'http://www.pragueproms.cz/layout/order_a_en.jpg'); 
                                },function () {
                                $(this).attr('src', 'http://www.pragueproms.cz/layout/order_en.jpg');
                                }
                );
});

 function checkSoutez(){

if(document.soutez.jmeno.value==""){
window.alert('Vyplňte své jméno.');
document.soutez.jmeno.focus();
  return false;
}

}

function checkConcertcz(){

var total = 0;   
$(".price").each( function(){
          total += parseInt($(this).val());
});


if(total<=0){
window.alert('Musíte vybrat alespoň jednu vstupenku.');
document.getElementById("page_left").focus;
  return false;
}

if(document.registration.platba.value=="0"){
window.alert('Vyberte způsob platby.');
document.registration.platba.focus();
  return false;
}

if(document.registration.doprava.value=="0"){
window.alert('Vyberte způsob dopravy.');
document.registration.doprava.focus();
  return false;
}

if(document.registration.jmeno.value==""){
window.alert('Vyplňte jméno.');
document.registration.jmeno.focus();
  return false;
}

if(document.registration.prijmeni.value==""){
window.alert('Vyplňte příjmení.');
document.registration.prijmeni.focus();
  return false;
}

if(document.registration.mesto.value==""){
window.alert('Vyplňte město.');
document.registration.mesto.focus();
  return false;
}

if(document.registration.ulice.value==""){
window.alert('Vyplňte ulice.');
document.registration.ulice.focus();
  return false;
}

if(document.registration.cp.value==""){
window.alert('Vyplňte číslo popisné.');
document.registration.cp.focus();
  return false;
}

if(document.registration.psc.value==""){
window.alert('Vyplňte psc.');
document.registration.psc.focus();
  return false;
}

if(document.registration.telefon.value==""){
window.alert('Vyplňte telefon.');
document.registration.telefon.focus();
  return false;
}

re = new RegExp("^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}$");
  if (!re.test(document.registration.email.value)) {
     window.alert("Emailová adresa nemá správný formát");
     document.registration.email.focus();
     return false;
} 

if(document.registration.kod.value==""){
window.alert('Opište text z obrázku.');
document.registration.kod.focus();
  return false;
}

}


function checkConcerten(){

var total = 0;   
$(".price").each( function(){
          total += parseInt($(this).val());
});


if(total<=0){
window.alert('At least one ticket must be chosen.');
document.getElementById("page_left").focus;
  return false;
}

if(document.registration.platba.value=="0"){
window.alert('Choose a type of payment.');
document.registration.platba.focus();
  return false;
}

if(document.registration.doprava.value=="0"){
window.alert('Choose a type of transport.');
document.registration.doprava.focus();
  return false;
}

if(document.registration.jmeno.value==""){
window.alert('Name must be filled in.');
document.registration.jmeno.focus();
  return false;
}

if(document.registration.prijmeni.value==""){
window.alert('Surname must be filled in.');
document.registration.prijmeni.focus();
  return false;
}

if(document.registration.mesto.value==""){
window.alert('City must be filled in.');
document.registration.mesto.focus();
  return false;
}

if(document.registration.ulice.value==""){
window.alert('Street must be filled in.');
document.registration.ulice.focus();
  return false;
}

if(document.registration.cp.value==""){
window.alert('House number must be filled in.');
document.registration.cp.focus();
  return false;
}

if(document.registration.psc.value==""){
window.alert('ZIP code must be filled in.');
document.registration.psc.focus();
  return false;
}

if(document.registration.telefon.value==""){
window.alert('Phone must be filled in.');
document.registration.telefon.focus();
  return false;
}

re = new RegExp("^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}$");
  if (!re.test(document.registration.email.value)) {
     window.alert("Email address is invalid.");
     document.registration.email.focus();
     return false;
} 

if(document.registration.kod.value==""){
window.alert('Rewrite the text in the picture.');
document.registration.kod.focus();
  return false;
}

}