.subNav{ position:absolute;z-index: -1; top:-90px;}
var subnav = this.getElementsByClassName('subNav')[0];
clearInterval(subnav.time);
subnav.time = setInterval(function(){if(subnav.offsetTop<30){subnav.style.top = subnav.offsetTop + 10 +'px';}else{clearInterval(subnav.time);}},30);
var subnav = this.getElementsByClassName('subNav')[0];
clearInterval(subnav.time);
subnav.time = setInterval(function(){if(subnav.offsetTop<30){subnav.style.top = subnav.offsetTop + 10 +'px';}else{clearInterval(subnav.time);}},30);
最新回答 / html2015
在body里将后面3个一级标签下面也像前两个加上二级标签就可以了。<body><ul class="nav"> <li><a href="#">一级菜单</a> <ul class="subNav"> <li><a href="#">二级菜单</a></li> <li><a href="#">二级菜单</a...
2016-04-17