form_verzonden = 0;
foutmeldingen = new Object();
foutmeldingen['cczf_user'] = "Uw inlognaam ontbreekt\n(uw lidnummer of mailadres)";
foutmeldingen['cczf_ww']   = "Uw wachtwoord ontbreekt";
function test(velden,check_velden) {
  e_mail_ok = 1;
	if (typeof(velden.email) != 'undefined' ) {
		if (velden.email.value.indexOf("@") == -1 ||
				velden.email.value.indexOf(".") == -1 ||
				velden.email.value.length        <  6 ||
				velden.email.value.indexOf(" ")  >  0 ||
				velden.email.value.indexOf(",")  >  0 ||
				velden.email.value.indexOf("'")  >  0 ||
				velden.email.value.indexOf("/")  >  0 ||
				velden.email.value.indexOf("\\") >  0 ||
				velden.email.value.indexOf("<") != -1 ||
				velden.email.value.indexOf(">") != -1 ||
				velden.email.value.indexOf("@") > velden.email.value.lastIndexOf(".")
			 ) {
			e_mail_ok = 0;
		}
  }
  base_check = 0;
	
  for(i=0;i<check_velden.length;i++) {
  	if (typeof(velden[check_velden[i]]) != 'undefined' && velden[check_velden[i]].value.length < 2 ) {
			if (typeof(foutmeldingen[check_velden[i]]) != 'undefined') { alert(foutmeldingen[check_velden[i]]);}
			else                                                       { alert("De/uw "+check_velden[i]+" ontbreekt."); }
      base_check = 1;
  		velden[check_velden[i]].focus();
      i = check_velden.length;
  	}
  }
  if (base_check) { } else // als het hierboven al mis ging, niet nog meer fouten geven...

  if (e_mail_ok == 0 && velden.email.value.length > 0 )
  { alert("Uw e-mailadres is onjuist.");
    velden.email.focus();
  } else

  {
    if (form_verzonden == 0) {
      form_verzonden = 1;
      return (true);
    }
  }
  return (false);
}