jurvrn,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
#workman-top {
width: 100%;
height: 62px;
background-color: #48587d;
display: none;
position: fixed;
padding-top: 5px;
top: 0;
right: 0;
text-align: center;
z-index: 300;
box-shadow: 0 3px 7px 0 #c0c0c0;
}
p {
font-family: Verdana, Geneva, sans-serif;
font-style: normal;
font-weight: normal;
font-size: 10px;
letter-spacing: normal;
line-height: normal;
text-transform: none;
text-decoration: none;
text-align: left;
width: 300px;
}
body{
height: 3000px;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
function detectMob() {
return document.documentElement.clientWidth < 721;
}
jQuery(function (f) {
var element = f("#workman-top");
f(window).on("scroll touchmove",function (event) {
var limit = detectMob() ? 900 : 300;
element.stop()["fade" + (f(this).scrollTop() > limit ? "In" : "Out")](300);
}).trigger("scroll");
});
</script>
</head>
<body>
<div id="workman-top">МЕНЮ и КНОПКИ</div>
</body>
</html>