//通过滚动条控制导航条的展现隐藏
var oldScrollNum = 0;
window.onscroll = function(){
var t = document.documentElement.scrollTop || document.body.scrollTop;
//下滑
if (t>oldScrollNum) {
if (t>120) {
$("#mynavbar").css("margin-top","-70px");//顶部导航
$("#post-bottom-bar").css("bottom","-3pc");//底部导航
}
if (t>300) {
$("#right_meun").css("display","inline-block");//右侧导航
}
//上拉
}else{
//防止用a链接跳转也触发效果
if (oldScrollNum-t<20) {
$("#mynavbar").css("margin-top","0px");//顶部导航
$("#post-bottom-bar").css("bottom","0");//底部导航
}
if (t<=300) {
$("#right_meun").css("display","none");//右侧导航
}
}
oldScrollNum = t;
}
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