效果图如下:
主要JS代码如下:
<script type="text/javascript"> window.onload = function(){ var obj = document.getElementById("nav"); var _getHeight = obj.offsetTop; window.onscroll = function(){ var scrollTop = document.documentElement.scrollTop || document.body.scrollTop; if(scrollTop < _getHeight){ obj.style.position = 'relative'; }else{ obj.style.position = 'fixed'; } } } </script>
转载请注明: haoshu发表于浩叔逛逛>>https://www.haoshu888.com/js/1028.html