function waliduj_newsletter(){
    var validValue = 1;
    var strEmail = document.getElementById("emailNewsletter").value;
    var pustePole = 1;
    validRegExp = /^[^@]+@[^@]+.[a-z]{2,}$/i;
    
    // search email text for regular exp matches
    if (strEmail.search(validRegExp) == -1) {
        document.getElementById("emailNewsletter_error").style.display = 'block';
        validValue = 0;
    }
    
    if (validValue == 1) {
        document.getElementById('formularzNewslettera').submit();
    }
}

function newsletter_clear() {
	document.getElementById("emailNewsletter").value = "";
	document.getElementById("emailNewsletter_error").style.display = 'none';
}

window.addEvent('domready', function(){

if (document.getElementById('emailNewsletter')) {
	$('emailNewsletter').addEvent('click', function(){
		newsletter_clear();
	});
}

if (document.getElementById('wyslijNewsletter')) {
	$('wyslijNewsletter').addEvent('click', function(){
		waliduj_newsletter()
	});
}
});