function sprawdzDane() {
	var osoba = document.getElementById('osoba');
	var nad_email = document.getElementById('nad_email');
	var msg = document.getElementById('msg');
	var OsobaTekst = osoba.value;
	var EmailTekst = nad_email.value;
	var MsgTekst = msg.value;
	var err = false;
	var regex = /^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
	var validateemail = regex.test(EmailTekst);
	if(OsobaTekst == ''){
	       osoba.style.borderColor = "#dd0000";
	       errorOsoba.style.display = "inline";
	              err = true;
	}
	else {
	       osoba.style.borderColor = "#dddddd";
	       errorOsoba.style.display = "none";
	}
	if(EmailTekst == ''){
	       nad_email.style.borderColor = "#dd0000";
	       errorEmail.style.display = "inline";
	              err = true;
	}
	else {
	       nad_email.style.borderColor = "#dddddd";
	       errorEmail.style.display = "none";
	}
	if(!validateemail){
	       nad_email.style.borderColor = "#dd0000";
	       errorEmail.style.display = "inline";
	              err = true;
	}
	else {
	       nad_email.style.borderColor = "#dddddd";
	       errorEmail.style.display = "none";
	}
	if(MsgTekst == ''){
	       msg.style.borderColor = "#dd0000";
	       errorMsg.style.display = "inline";
	              err = true;
	}
	else {
	       msg.style.borderColor = "#dddddd";
	       errorMsg.style.display = "none";
	}
	if (err) {
	       return false;
	}
	else if (!err) {
	       return true;
	}
}

function mailto(uzytkownik, domena) {
	location.href = "mailto:" + uzytkownik + "@" + domena;
}