function checkNewsletterSignUp() {

	var _err = "";
	
	if (getEl('firstName').value.length == 0) {
		_err += "First name\n";
	}
	if (getEl('lastName').value.length == 0) {
		_err += "Last name\n";
	}
	if (getEl('eMail').value.length == 0) {
		_err += "E-mail\n";
	}
	if (getEl('company').value.length == 0) {
		_err += "Company\n";
	}
	
	if (_err.length > 0) {
		alert("Please, fill in these fileds:\n\n" + _err);
		return false;
	} else {
		return true;
	}
		

}

function getEl(_id) {
	return document.getElementById(_id);
}