Javascript实现简单二级下拉菜单实例_javascript技巧

for( i = 0; i < lis.length; i++)
{
if(lis[i].className == "child")
{
lis[i].onmouseover = function()
{
var ulObj1 = this.getElementsByTagName('ul')[0];
ulObj1.style.display = "block";
this.style.backgroundColor="#ccc";
this.style.color="black";
}
}

lis[i].onmouseout = function()
{
var ulObj1 = this.getElementsByTagName('ul')[0]; //this是HTMLElement对象
ulObj1.style.display = "none";
this.style.backgroundColor="#3E3E3E";
this.style.color="white";
}
}