if (BrowserName=='Firefox') {
   var scrollCookie = new QQ.Cookie();
   window.addEventListener('load',scrollToLastPosition,false);
}

function scrollToLastPosition(){
      if (scrollCookie.getCookieData("do") == 1){
      	var scrollTop = parseInt(scrollCookie.getCookieData("sp"));
      	window.scrollTo(0,scrollTop);
      	scrollCookie.setCookieData("do",0);
      }
      setInterval(ssp,100);
}

// save scrolling position every 100ms
function ssp(){
	scrollCookie.setCookieData("sp",window.pageYOffset);
}