aLi[i].onmouseover=function(){
var This=this;var liss=this.firstChild;var lis=this.childNodes;clearInterval(This.time);
This.time=setInterval(function(){
if(liss.innerHTML=="一级菜单"){
lis[2].style.height=lis[2].offsetHeight+30+"px";
if(lis[2].offsetHeight>=120){
clearInterval(This.time);
}
}
},30);
var This=this;var liss=this.firstChild;var lis=this.childNodes;clearInterval(This.time);
This.time=setInterval(function(){
if(liss.innerHTML=="一级菜单"){
lis[2].style.height=lis[2].offsetHeight+30+"px";
if(lis[2].offsetHeight>=120){
clearInterval(This.time);
}
}
},30);
已采纳回答 / Dexter_psj
margin 是外边距top-10px;是和上面的元素距离减10像素,你bottom10是把下面的元素推开10个像素;就好像你站在你爸和你妈中间,不能说吧你妈妈推开1米就相当于你靠近你爸一米吧!
2016-01-29