js创建子节点
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js创建子节点</title>
</head>
<body>
<!--在后面加-->
<ul id="test1">
<li>JavaScript</li>
<li>HTML</li>
</ul>
<!--前面加入-->
<ul id="test2">
<li>JavaScript</li>
<li>HTML</li>
</ul>
<!--指定位置插入-->
<ul id="test3">
<li>javascript</li>
<li>HTML</li>
</ul>
</body>
<script type="text/javascript">
var otest1 = document.getElementById("test1");
var newnode1=document.createElement("li");
newnode1.innerHTML="This is a new li";
otest1.appendChild(newnode1);
// otest1.insertBefore(newnode1,otest1.lastChild);
var otest2 = document.getElementById("test2");
var newnode2=document.createElement("li");
newnode2.innerHTML="this is a new li";
otest2.insertBefore(newnode2,otest2.firstChild);
// 指定位置插入
var otest3 = document.getElementById("test3");
var node3=document.getElementsByClassName("li")[1];
var newnode3=document.createElement("li");
newnode3.innerHTML="this is a new li";
otest3.insertBefore(newnode3,node3);
</script>
</html>
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