<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<script>
window.onload = function(){
var oTxt = document.getElementById(‘txt‘);
var oBtn = document.getElementById(‘btn‘);
var oBox = document.getElementById(‘box‘);
oBtn.onclick = function(){
var oLi = document.createElement(‘li‘);
oLi.innerHTML = oTxt.value + ‘<a href="javascript:;">隐藏</a>‘;
if(oBox.children.length){
oBox.insertBefore(oLi,oBox.children[0]);
}else{
oBox.appendChild(oLi);
}
oTxt.value = ‘‘;
oLi.children[0].onclick = function(){
oBox.removeChild(this.parentNode);
}
}
}
</script>
</head>
<body>
user:<input type="text" value="" id="txt"/>
<input type="button" value="添加" id="btn"/>
<ul id="box"></ul>
</body>
</html>
原文：http://www.cnblogs.com/guolimin/p/6087249.html