var diacheck = false;
var diatime = 5;
function diashow(checkbox, url) {
  if (checkbox) {
    diacheck = true;
    setTimeout("gonext('"+url+"')", (diatime * 1000));
  } else diacheck = false;
}

function gonext(url) {
  if (diacheck) window.location.href = url + "&diatime="+diatime;
}

function setDiaTime(wert) {
  el = document.getElementById("diashowcheck");
  el.checked = false;
  diacheck = false;
  if (wert > 0) diatime = wert;
}