function checkDownloadForm() {
	var error = '';
	if (validateEmpty(document.getElementById('d_companyname'))) {
		if (isDE())
			error+= "Der Firmenname fehlt\n";
		else
			error+= "The companyname is missing\n";
	}
	if (validateEmpty(document.getElementById('d_yourname'))) {
		if (isDE())
			error+= "Ihr Name fehlt\n";
		else
			error+= "Your name is missing\n";
	}
	if (validateEmpty(document.getElementById('d_your_email'))) {
		if (isDE())
			error+= "Ihre Emailadresse fehlt\n";
		else
			error+= "Your email address is missing\n";
	}
	if (error.length > 0) {
		if (isDE())
			alert("Es wurden Fehler in Ihrer Eingabe gefunden:\n\n"+error);
		else
			alert("There are errors in your input:\n\n"+error);
		return false;
	}
	return true;
}