//为keyListener方法注册按键事件 document.onkeydown=keyListener; function keyListener(e){ // 当按下回车键，执行我们的代码 if(e.keyCode == 13){ login(); } }另附登录界面详细代码
<!DOCTYPE HTML><html><head><title>考试后台登录</title><!-- Custom Theme files --><link href="../CSS/style1.css" rel="stylesheet" type="text/css" media="all"/><!-- Custom Theme files --><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="keywords" content="后台登录" /><!--Google Fonts--><!--<link href='//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800' rel='stylesheet' type='text/css'>--><!--Google Fonts--></head><body><!--header start here--><div class="login-form"> <script type="text/javascript"> function login(){ var username=window.document.getElementById("username").value; var password=window.document.getElementById("password").value; if(password=="123456") { window.sessionStorage.setItem("username", username); window.location.href="../index1.html"; }else{ alert("密码错误请输入正确的密码，例如：123456！"); return false; } } //为button设置回车事件（百度搜索所得） //为keyListener方法注册按键事件 document.onkeydown=keyListener; function keyListener(e){ // 当按下回车键，执行我们的代码 if(e.keyCode == 13){ login(); } } </script> <div class="top-login"> <span><img src="../Images/group.png" alt=""/></span> </div> <h1>登录</h1> <div class="login-top"> <form> <div class="login-ic"> <i ></i> <input type="text" id="username" class="11" placeholder="请输入真实姓名"/> <div class="clear"> </div> </div> <div class="login-ic"> <i class="icon"></i> <input type="password" id="password" placeholder="请输入密码（默认密码123456）"/> <div class="clear"> </div> </div> <div class="log-bwn"> <input type="button" value="登录考试" onclick="login()"> </div> </form> </div> <p class="copy">© 2017 统本软件班考试系统</p></div> <!--header start here--></body></html>
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