<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="icon" href="favicon.ico" />
    <!--jquery库-->
    <script src="js/jquery.min.js"></script>
    <!--bootstrap库-->
    <link href="css/bootstrap.min.css" rel="stylesheet" />
    <script src="js/bootstrap/bootstrap.min.js"></script>
    <!--[if lt IE 9]>
      <script src="js/bootstrap/html5shiv.min.