博客园边栏滚动隐藏代码

$(document).ready(function(){

$(".cnblogs_code pre").addClass("prettyprint"); 
$(".code").toggleClass("prettyprint"); 

window.setTimeout(prettyPrint, 1000);
var str = "<li><div id='closeside'><a class='close-sidebar' style='cursor:pointer;'>关闭侧边栏</a><a class='show-sidebar' style='display:none;cursor:pointer'>显示侧边栏</a></div></li>";
$('#navList').html($('#navList').html()+str);

    var $sidebar   = $("#sideBar"),   
        $window    = $(window),   
        offset     = $sidebar.offset(),   
        topPadding = 15;   
  
    $window.scroll(function() {   
        if ($window.scrollTop() > offset.top) {   
            $sidebar.stop().animate({   
                marginTop: $window.scrollTop() - offset.top + topPadding   
            });   
        } else {   
            $sidebar.stop().animate({   
                marginTop: 0   
            });   
        }   
    });   
  
  
    $('.close-sidebar').click(function() {
        $("#content").css('background','none');
        $('.close-sidebar').hide();
        $('.close-sidebar,#sideBar').fadeOut(500);
        $('.show-sidebar').show();
        window.setTimeout(function(){
            $(".forFlow").css('margin','-18px 0 0 2px'); 
            $("#mainContent").css('background','url("http://pic002.cnblogs.com/images/2012/25317/2012072712554778.gif") no-repeat 2px 0px'); 
        },1000);
    });

    $('.show-sidebar').click(function() {
        $('.show-sidebar').hide();
        $('.close-sidebar').show();
        $(".forFlow").css('margin','-18px 0 0 235px'); 
        $("#mainContent").css('background','url("http://pic002.cnblogs.com/images/2012/25317/2012072712554778.gif") no-repeat 235px 0px'); 
        window.setTimeout(function(){
            $('#sideBar').fadeIn(500);
        },1000);
    });

});