<body>
<img id="light" src="img/off.jpg">
<script>
var light = document.getElementById("light");
var flag = false;
if(flag){
light.src = "img/on.jpg";
flag = false;
}else{
light.src = "img/off.jpg";
flag = true;
}
</script>
</body>
<body>
<img src="../../../../imgs/banner_1.jpg" width="100%" id="img">
<script>
var number = 1;
/*修改图片*/
function fun(){
number ++;
if(number > 3){
number = 1;
}
var img = document.getElementById("img");
img.src = "../../../../imgs/banner_"+ number +".jpg";
}
setInterval(fun,3000);
</script>
</body>
p{
text-align: center;
font-size: 20px;
}
#time{
color: red;
}
<p>
<span id="time">5</span>秒之后跳转到首页
</p>
<script>
var time = document.getElementById("time");
var number = 5;
function fun(){
number --;
if(number <= 0){
//跳转页面
location.href="https://www.baidu.com";
}
//修改标签体里的内容
time.innerHTML = number + "";
}
//设置定时器
setInterval(fun,1000);
</script>
样式文件
table{
border: 1px solid;
margin: auto;
width: 500px;
}
td,th{
text-align: center;
border: 1px solid;
}
div{
text-align: center;
margin: 50px;
}
html 页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动态表格</title>
<link rel="stylesheet" href="table.css">
</head>
<body>
<div>
<input type="text" id="id" placeholder="请输入编号">
<input type="text" id="name" placeholder="请输入姓名">
<input type="text" id="gender" placeholder="请输入性别">
<input type="button" id="btn_ad" value="添加">
</div>
<table>
<caption>学生信息表</caption>
<tr>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr>
<td>1</td>
<td>令狐冲</td>
<td>男</td>
<td><a href="javascript:void(0)" onclick="delTr(this);">删除</a></td>
</tr>
<tr>
<td>2</td>
<td>任我行</td>
<td>男</td>
<td><a href="javascript:void(0)" onclick="delTr(this);">删除</a></td>
</tr>
<tr>
<td>3</td>
<td>岳不群</td>
<td>？</td>
<td><a href="javascript:void(0)" onclick="delTr(this);">删除</a></td>
</tr>
</table>
<script rel="script" src="table.js"></script>
</body>
</html>
JS代码
var btn_add = document.getElementById("btn_ad");
btn_add.onclick = function (){
var id = document.getElementById("id").value;
var name = document.getElementById("name").value;
var gender = document.getElementById("gender").value;
var table = document.getElementsByTagName("table")[0];
table.innerHTML += "<tr>\n" +
" <td>"+id+"</td>\n" +
" <td>"+name+"</td>\n" +
" <td>"+gender+"</td>\n" +
" <td><a href=\"javascript:void(0)\" οnclick=\"delTr(this);\">删除</a></td>\n" +
" </tr>";
}
function delTr(obj){
var table = obj.parentNode.parentNode.parentNode;
var tr = obj.parentNode.parentNode;
table.removeChild(tr);
}