离开页面存setStorageCookie，再回到页面取setStorageCookie实现定位到tab

//检测页面是否即将离开
$(window).bind('beforeunload',function(){
    var tagValue = $(".nav-cont ul li.on").attr("id");
    setStorageCookie("tag",tagValue);存session
});

获取session，判断tab定位

//取cookie,判断tab
    var tagValue = getStorageCookie("tag");
    if (tagValue == "pinglun"){
        changecTabbar(2);
    }else if (tagValue == "zhaopianqian"){
        changecTabbar(3);
    }else{
        changecTabbar(1);
    }

轻松解决，记一下