// JavaScript Document

function sprawdz_email(){
        if (document.newsletter.email.value==''){
                alert("Proszę wpisać adres e-mail !")
                document.newsletter.email.focus();
        } else {
                if ((document.newsletter.email.value.indexOf("@")==document.newsletter.email.value.lastIndexOf("@"))&&(document.newsletter.email.value.charAt(document.newsletter.email.value.indexOf("@")+1) != '.')&&(document.newsletter.email.value.charAt(document.newsletter.email.value.indexOf("@")-1) != '.')&&(document.newsletter.email.value.indexOf("@") != 0)&&(document.newsletter.email.value.indexOf(".") != 0)&&(document.newsletter.email.value.lastIndexOf(".") > document.newsletter.email.value.indexOf("@"))){
                        //document.newsletter.action = "61";
                        document.newsletter.submit();
                } else {
                        alert('Proszę wpisać poprawnie e-mail.');
                        document.newsletter.email.focus();
                }
        }
}