scroll position test

(function() {
    function loadScroll() {
        var cookieList = document.cookie.split(';');
        for (var i = 0; i < cookieList.length; i++) {
            var cookieParts = cookieList[i].split('=');
            if (cookieParts[0] == 'scrollPosition') {
                var values = unescape(cookieParts[1]).split('/');
                for (var j = 0; j < values.length; j++) {
                    var currentValue = values[j].split(',');
                    try {
                        if (currentValue[0] == 'window') {
                            window.scrollTo(currentValue[1], currentValue[2]);
                        } else if (currentValue[0]) {
                            var elm = document.getElementById(currentValue[0]);
                            elm.scrollLeft = currentValue[1];
                            elm.scrollTop = currentValue[2];
                        }
                    } catch (ex) { }
                }
                return;
            }
        }
    }
    function saveScroll() {
        var s = 'scrollPosition=';
        var wl, wt;

        wl = f_scrollLeft();
        wt = f_scrollTop();

        function f_scrollLeft() {
            return f_filterResults (
                window.pageXOffset ? window.pageXOffset : 0,
                document.documentElement ? document.documentElement.scrollLeft : 0,
                document.body ? document.body.scrollLeft : 0
            );
        }
        function f_scrollTop() {
            return f_filterResults (
                window.pageYOffset ? window.pageYOffset : 0,
                document.documentElement ? document.documentElement.scrollTop : 0,
                document.body ? document.body.scrollTop : 0
            );
        }
        function f_filterResults(n_win, n_docel, n_body) {
            var n_result = n_win ? n_win : 0;
            if (n_docel && (!n_result || (n_result > n_docel)))
                n_result = n_docel;
            return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
        }
        var elements='';
        if (document.getElementsByName("part[0][content]").length > 0) {
            elements = document.getElementsByName("part[0][content]");
        } else if (document.getElementsByName("snippet[content]").length > 0) {
            elements = document.getElementsByName("snippet[content]");
        } else if (document.getElementsByName("layout[content]").length > 0) {
            elements = document.getElementsByName("layout[content]");
        } else if (document.getElementsByName("file[content]").length > 0) {
            elements = document.getElementsByName("file[content]");
        }
        var e = elements[0];
        if (e.id && (e.scrollLeft || e.scrollTop)) {
            s += e.id + ',' + e.scrollLeft + ',' + e.scrollTop + '/';
        }
        document.cookie = s + ';';
    }
    var addEvent, eventPrefix;
    if (window.attachEvent) {
        addEvent = window.attachEvent;
        eventPrefix = 'on';
    } else {
        addEvent = window.addEventListener;
        eventPrefix = '';
    }
    addEvent(eventPrefix + 'load', function() {
        loadScroll();
        if (typeof Sys != 'undefined' && typeof Sys.WebForms != 'undefined') {
            Sys.WebForms.PageRequestManager.getInstance().add_endRequest(loadScroll);
            Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(saveScroll);
        }
    }, false);
    addEvent(eventPrefix + 'unload', saveScroll, false);
})();