window.onload = function(){
???????????? var oTab = document.getElementById("tabs");
???????????? var oUl = oTab.getElementsByTagName("ul")[0];
???????????? var oLis = oUl.getElementsByTagName("li");
???????????? var oDivs= oTab.getElementsByTagName("div");

為什么這里得到節(jié)點(diǎn)數(shù)組不是用document呢 而是用oUI和oTab