Navigation fixed effect implemented by jquery_jquery

Navigation fixed effect implemented by jquery

Copy code The code is as follows:

1.jquery code, .nav is the navigation class
$(function(){
$(window).scroll(function() {
if($(window).scrollTop()>=250){
$(".nav" ).addClass("fixedNav");
}else{
$(".nav").removeClass("fixedNav");
}
});
});

2.CSS code
.fixedNav{
position:fixed;
top:0px;
left:0px;
width:100%;
z-index:100000 ;
_position:absolute;
_top:expression(eval(document.documentElement.scrollTop));
}

3.HTML code

Navigation fixed