Azt hittem, van valami közismert trükk

window.onload = initAll;

function initAll() {
var visited;
visited = cookieCheck();
if (!cookieCheck()) {
checkForNewContent(document.links,visited);
}

}

function checkForNewContent(thisLink,needAlert) {
allClass = "";
for (var i=0; i<thisLink.length; i++) {
if (thisLink[i].parentNode.getElementsByTagName("li")) {
allClass = thisLink[i].parentNode.getAttribute("class").split(" ");
if (allClass) {
for (j=0;j<allClass.length;j++){
switch (allClass[j]) {
case "uj":
if (!needAlert) {
alert("Új fejezet!"+'\n'+thisLink[i].name);
}
thisLink[i].title="Új fejezet!"
break;
case "modositott":
if (!needAlert) {
alert("Megváltozott tartalom!"+'\n'+thisLink[i].name);
}
thisLink[i].title="Megváltozott tartalom!"
break;
default:
break
}
}
}
}
}
}


function cookieCheck(){
var thisCookie = document.cookie.split("; ");
var cookieCnt = thisCookie.length;

for (j=0;j<cookieCnt;j++) {
var cookieName = thisCookie[j].split("=")[0];
if (cookieName=="pageVisited") {
return true;
}
}
var visitDate = new Date();
document.cookie = "pageVisited=" + visitDate.toUTCString() +";path=/;expires='';";
return false;
}