請(qǐng)幫我看看我寫的哪里有問題
?function?replaceMessage()
?{??????????
?var?newnode=document.createElement('i');??????????
?newnode.innerHTML="JavaScript"; ??
?var?old=document.getElementById('oldnode'); ??
?var?oldnode=document.getElementsByTagName('div')
?oldnode.replaceChild(newnode,old);;}
2018-07-21
<script?type="text/javascript"> ????function?replaceMessage(){??????????? ????????var?newnode?=?document.createElement('i');? ????????var?newText?=?document.createTextNode("JavaScript");? ????????newnode.appendChild(newText);? ????????var?old=document.getElementById('oldnode');? ????????oldnode.parentNode.replaceChild(newnode,old);? ????} </script>2018-07-07
var?oldnode=document.getElementsByTagName('div')[0]?;getElementsByTagName獲取的是一個(gè)集合，要獲取對(duì)象就要加上下標(biāo)獲取2018-07-05
沒啥問題吧，
?var?oldnode=document.getElementsByTagName('div')2018-07-05
暫時(shí)沒看出來什么問題