var aLi=document.getElementsByClassName('li'); for(var i=0; i<aLi.length; i++){ aLi[i].onmouseover=function(){ var This=this.getElementsByTagName('ul')[0]; clearInterval(This.time) This.time=setInterval(function(){ This.style.height=This.offsetHeight+8+"px"; if(This.offsetHeight>=120){ clearInterval(This.time); } },30) //鼠标经过一级菜单,二级菜单动画下拉显示出来 } //鼠标离开菜单,二级菜单动画收缩起来。 aLi[i].onmouseout=function(){ var This=this.getElementsByTagName('ul')[0]; claerInterval(This.time); Thi.time=setInterval(function(){ This.style.height=This.offsetHeight-8+"px"; if(This.offsetHeight<=0){ clearInterval(This.time); } },30) } }}
添加回答
举报
0/150
提交
取消