无法改变位置。它距离顶部仍有 250 像素。请,需要帮助!
这是jQuery:
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js'></script>
<script>
$(window).scroll(function(){
$('#menu').css('top',Math.max(0,250px-$(this).scrollTop()));
});
</script>
HTML ::
<div class='pure-u' id='menu' style='position: fixed;top:250px;'>
<div class='pure-menu pure-menu-open'>
<ul>
<li class=' '>
<a href='/base/'>Base</a>
</li>
</ul>
</div>
</div>