<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script>
window.onload=function(){
var oD=document.getElementById("w");
var oBtn=document.getElementById("btn");
var oTxt=document.getElementById("txt");
oBtn.onclick=function(){
var oLi=document.createElement("li");
oLi.innerHTML=oTxt.value;
if(oD.children.length>0){//children方法详见Jquery
//新节点插入第一个节点前面
oD.insertBefore(oLi,oD.childNodes[0]);
}else{
//最后一个子节点之后添加节点
oD.appendChild(oLi);
}
};
};
</script>
</head>
<body>
<input type="text" id="txt" />
<input type="button" id="btn" value="添加" />
<div>
<ul id="w">
</ul>
</div>
</body>
</html>
