<!-- start
function Emailcheck()
{
	allesok=true;
	
	if ((document.nieuwsbriefform.email.value!="") && (document.nieuwsbriefform.email.value.indexOf("@")==-1 || document.nieuwsbriefform.email.value.indexOf(".")==-1 || document.nieuwsbriefform.email.value.indexOf(" ")!=-1 || document.nieuwsbriefform.email.value.length<6) || document.nieuwsbriefform.email.value=="") {
		allesok=false;
		alert("Please fill in a valid email address!");
		document.nieuwsbriefform.email.focus();
	}
	
	if (allesok==true){
		document.nieuwsbriefform.submit();
	}
}
//-->