var regexp = / /g;

function versturen() {
	if (document.forms['form1'].naam.value.replace(regexp,"") == "") {
		alert('Unesite svoje ime.');
		document.forms['form1'].naam.focus();
		return false;
	}
	if (document.forms['form1'].email.value.replace(regexp,"") == "") {
		alert('Unesite svoju e-mail adresu.');
		document.forms['form1'].email.focus();
		return false;
	}else if (document.forms['form1'].email.value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1) {
		alert('U heeft een ongeldig e-mailadres ingevuld.');
		document.forms['form1'].email.focus();
		return false;
	}
	document.forms['form1'].submit();
}