var name = "#floatMenu";
var menuYloc = null;
$(document).ready(function() {
    if ($(name)) {
        menuYloc = 0;
        $(window).scroll(function() {
            offset = menuYloc + $(document).scrollTop() + "px";
            if ($(document).scrollTop() > 601)
                $(name).animate({ top: offset }, { duration: 500, queue: false, complete: function() {
                    var pos = parseInt(document.getElementById('floatMenu').style.top.substring(0, document.getElementById('floatMenu').style.top.indexOf("px")));
                    if (pos < 600 || $(document).scrollTop() < 610) document.getElementById('floatMenu').style.top = "600px";
                }
            });
        });
    }
});