var name = "#floatMenu";
var menuYloc = null;

 //$(document).ready(function(){
jQuery(document).ready(function($){

 menuYloc = parseInt($(name).css("top").substring(0,$(name).css("top").indexOf("px")))
 $(window).scroll(function () {
 offset = menuYloc+$(document).scrollTop()+"px";
 $(name).animate({top:offset},{duration:500,queue:false});
 });
 });