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老师批语：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>第十二节课作业：2.仿聊天机器人</title>
<style type="text/css">
body {
font-family: microsoft yahei;
}
div:nth-child(1) {
width: 450px;
height: 650px;
background-color: lightskyblue;
margin:30px auto;
color: black;
box-shadow: 2px 2px 2px #808080;
}
h2 {
text-align: center;
margin-bottom: -10px;
}
div:nth-child(2) {
width: 400px;
height: 500px;
border:4px double seagreen;
background-color: #f5f5f5;
margin:20px auto 10px;
}
ul {
list-style-type: none;
line-height: 2em;
overflow: hidden;
padding:15px;
}
table {
width: 90%;
height: 80px;
margin:auto;
}
textarea {
width: 335px;
resize:none;
border:none;
background-color: lightyellow;
margin:0;
padding:0;
text-indent: 0.3em;
}
button {
border-radius: 10%;
width: 60px;
height: 40px;
background-color: seagreen;
color: #fff;
border:none;
margin-left:5px;
}
button:hover {
cursor: pointer;
background-color:orange;
font-size: 1.02em;
}
</style>
</head>
<body>
<div>
<h2>我与老婆的对话</h2>
<div contenteditable="false">
<ul>
<li></li>
</ul>
</div>
<table>
<tr>
<td><textarea name="text" cols="50" rows="4" autofocus="autofocus"></textarea></td>
<td><button>发送</button></td>
</tr>
</table>
</div>
<script type="text/javascript">
// 获取页面中的按钮，文本域，对话窗口
var btn = document.getElementsByTagName('button')[0]
var text = document.getElementsByName('text')[0]
var list = document.getElementsByTagName('ul')[0]
var sum = 0
btn.onclick = function (){
if (text.value.length == 0){
alert('黄忠倚，现在几点啦，你怎么还不睡觉，第二天不用上班吗？')
return false
}
onkeydown="if(event.keyCode==13){gosubmit();}"
var myComment = text.value
text.value = ''
//创建新节点
var li = document.createElement('li')
var myPic = '<img src="./images/hzy.jpg" width="30" style="border-radius:50%">'
li.innerHTML = myPic +'<span style="background-image:url(./images/bg.png);padding:10px 10px 10px 15px;" >' + myComment + '</span>'
//插到页面中：父级.appendChild()
list.appendChild(li)
sum += 1
setTimeout(function(){
var info = ['每晚都这样','奶瓶又不烫','我真是火冒三丈','想打人都有份','你马上给我滚出去！']
var temp = info[Math.floor(Math.random()*5)]
var reply = document.createElement('li')
var herPic = '<img src="./images/laopo.jpg" width="30" style="border-radius:50%">'
reply.innerHTML = herPic+'<span style="color:red;background-image:url(./images/bg.png);padding:10px 10px 10px 15px;" >'+ temp + '</span>'
list.appendChild(reply)
sum += 1
},2000)
if (sum > 10) {
list.innerHTML =''
sum = 0
}
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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