js 记住浏览器的滚动条位置

    function SetCookie(sName, sValue) {        document.cookie = sName + "=" + escape(sValue);    }    function GetCookie(sName) {        var aCookie = document.cookie.split(";");        for (var i = 0; i < aCookie.length; i++) {            var aCrumb = aCookie[i].split("=");            if (sName == aCrumb[0]) {                return unescape(aCrumb[1]);            }        }        return null;    }    function scrollback() {        if (GetCookie("scroll") != null) {document.body.scrollTop = GetCookie("scroll");}    }使用：onscroll="SetCookie('scroll', body.scrollTop);"  onload="scrollback();"