function GetCookie(name) {
  var arg=name+"=";
  var alen=arg.length;
  var clen=document.cookie.length;
  var i=0;
  while (i<clen) {
    var j=i+alen;
    if (document.cookie.substring(i,j)==arg)
      return "here";
    i=document.cookie.indexOf(" ",i)+1;
    if (i==0) break;
  }
  return null;
}
var visit=GetCookie("ZZZZZ");
if (visit==null){
   window.location="index.php";
   var expire=new Date();
   expire=new Date(expire.getTime()+14400);
   document.cookie="ZZZZZ=here; expires="+expire;
}