function validateEmail(){
    window.alert('validace');
}

function button2Zpet(){
    var mail=document.getElementByID('form1:tabSet1:tab2:emailTextField1');
    var jmeno=document.getElementByID('form1:tabSet1:tab2:jmenoTextField1');
    var prijmeni=document.getElementByID('form1:tabSet1:tab2:prijmeniTextField1');
    if(mail.Value=''){
        window.alert('s');
        
    }
}