页面上的输入，记录

<!DOCTYPE html>

<html>

<head>

<meta charset="GBK-8">

<title>对话框</title>

</head>

<body>

<input type="text" name="shuru">

<button name="tijiao">发送</button>

<ul></ul>

<script>

var shuru=document.getElementsByName('shuru')[0];

var tijiao=document.getElementsByName('tijiao')[0];

var ul=document.getElementsByTagName('ul')[0];

tijiao.onclick=function(){

var li=document.createElement('li');

li.innerHTML = shuru.value;

ul.appendChild(li);

shuru.value='';

}

</script>

</body>

</html>