if(document.referrer.indexOf("forten.nl") != -1 || document.referrer.indexOf("forten.be") != -1) {window.top.location.href='http://www.forten.info/'};

//if((document.referrer.indexOf("stelling-van-amsterdam.nl") != -1) || (document.referrer.indexOf("stellingvanamsterdam.nl") != -1) || (document.referrer.indexOf("destellingvanamsterdam.nl") != -1) || (document.referrer.indexOf("noordholland.com") != -1))
//  window.alert("You are visiting via the site of the Cultural Heritage North-Holland Foundation. The website you are about to visit is a publication of the Military Heritage Amsterdam Foundation.")

//if((document.referrer.indexOf("noord-holland.nl") != -1) || (document.referrer.indexOf("provincie-noordholland.nl") != -1) || (document.referrer.indexOf("pnh.nl") != -1))
//  window.alert("You are visiting via de province North-Holland. The website you are about to visit is a publication of the Military Heritage Amsterdam Foundation.")