var pTimeoutCloseBgAd=null;
function changeBgAd() {
    var cssList = document.getElementsByTagName("link");
    for (var i = 0; i < cssList.length; i++) {
        if (cssList[i].id == "cssChangeBgAd") {
            cssList[i].disabled = "";
            //pTimeoutCloseBgAd=window.setTimeout("removeBgAd()",40000);
            break;
        }
    }
}

function removeBgAd() {
   if(pTimeoutCloseBgAd)
   {
     window.clearTimeout(pTimeoutCloseBgAd);
   }
   var cssList = document.getElementsByTagName("link");
   
   for (var i = 0; i < cssList.length; i++) {
        if (cssList[i].id == "cssChangeBgAd") {
            cssList[i].disabled = "disabled";
        }
    }
}

function launchRichBg() {
    changeBgAd();
}

function closeRichBg() {
    removeBgAd();
}