Question

js+css 三级竖向导航菜单 问题

效果是上面这个的，代码里面有下面一段不太理解，求大虾解释一下。谢谢
if (window.addEventListener)
window.addEventListener("load", buildsubmenus, false)
else if (window.attachEvent)
window.attachEvent("onload", buildsubmenus)

Answer 1

if (window.addEventListener)如果添加一个监听（键盘、鼠标）为真
window.addEventListener("load", buildsubmenus, false)卸载buildsubmenus

else if (window.attachEvent)如果分离
window.attachEvent("onload", buildsubmenus)加载buildsubmenus

上面是在window上注册个onload时间，处理方法是buildsubmenus