我跟老師的代碼一樣可是不知道為什么會(huì)提示這個(gè)：Cannot read property 'getElementsByTagName' of null//切換狀態(tài)var longinState=document.getElementById('longinState'), stateList=document.getElementById('loginStatePanel'), lis=stateList.getElementsByTagName('li'), stateTxt=document.getElementById('login2qq_state_txt'); loginState.onclick=function(){ stateList.style.display='block'; }
QQ面板切換效果的問(wèn)題
IT之王
2016-07-27 10:14:44
