<style type="text/css"> body { margin:0; padding:0; font:12px/25px 宋体; color:#333; } .wrap { 900px; margin:0 auto; } h2,h4,ul,li,dl,dt,dd { margin:0; padding:0; } a { color:#00f; } #mask { position:absolute; background:#fff; display:none; 400px; height:220px; border:1px solid #719cd1; z-index:1000; } #mask h2 { background:#719cd1; color:#fff; font-size:14px; line-height:25px; padding:0 5px; } #mask h2 img { float:right; margin-top:4px; cursor:pointer; } #mask .loginForm { padding:0 20px; } #mask .loginForm dl { 300px; margin:10px auto; line-height:30px; } #mask .loginForm dl dt { float:left; 60px; clear:left; } #mask .loginForm dl dd { margin-left::60px; } #mask .loginForm dl dd input { margin:3px 0; vertical-align:middle; } #mask .loginForm hr { height:1px; clear:both; } #welcome { position:absolute; 322px; } #welcome .top { background:url(images/welcome_top.gif); height:110px; text-align:right; } #welcome .top img { margin-top:75px; margin-right:10px; cursor:pointer; } #welcome .main { padding:0 25px; background:url(images/welcome_main.gif); height:120px; color:#417a1b; } #welcome .main h4 { clear:both; font-size:12px; } #welcome .main ul { } #welcome .main ul li { float:left; display:inline; 100px; margin:0 10px; } #top { text-align:right; } #header { padding:5px 0; } #content { height:600px; border:1px solid #b2d5f3; } </style> <script type="text/javascript"> window.onload = scrollWelcome; window.onscroll = scrollWelcome; window.onresize = scrollWelcome; function scrollWelcome() { // 欢迎框宽度 var welcomeWidth = 322; // 欢迎框高度，如果welcome-main显示，则高度为welcome-top的高度+welcome-main的高度，否则只为welcome-top的高度。 var welcomeHeight = document.getElementById("welcome-main").style.display == "none" ? 110 : 110 + 120; var welcome = document.getElementById("welcome"); // 滚动条向左滚动的距离 var scrollLeft = document.documentElement.scrollLeft; // 滚动条向上滚动的距离 var scrollTop = document.documentElement.scrollTop; // 可见宽度 var clientWidth = document.documentElement.clientWidth; // 可见高度 var clientHeight = document.documentElement.clientHeight; // 重新定义欢迎框的坐标 welcome.style.left = (scrollLeft + clientWidth - welcomeWidth) + "px"; welcome.style.top = (scrollTop + clientHeight - welcomeHeight) + "px"; } function Control() { var button = document.getElementById("control-button"); var welcomeMain = document.getElementById("welcome-main"); if(welcomeMain.style.display == "none") { welcomeMain.style.display = "block"; button.src = "images/welcome_min.gif"; } else { welcomeMain.style.display = "none"; button.src = "images/welcome_max.gif"; } scrollWelcome(); } function showForm() { var maskWidth = 400; var maskHeight = 200; var mask = document.getElementById("mask"); // 滚动条向左滚动的距离 var scrollLeft = document.documentElement.scrollLeft; // 滚动条向上滚动的距离 var scrollTop = document.documentElement.scrollTop; // 可见宽度 var clientWidth = document.documentElement.clientWidth; // 可见高度 var clientHeight = document.documentElement.clientHeight; // 重新定义登陆框的坐标 mask.style.left = scrollLeft + (clientWidth - maskWidth)/2 + "px"; mask.style.top = scrollTop + (clientHeight - maskHeight)/2 + "px"; // 显示 mask.style.display = "block"; } function HideMask() { var mask = document.getElementById("mask"); mask.style.display = "none"; } </script> </head> <body> <div id="mask"> <h2><img src="images/button_close.gif" onclick="HideMask()" />欢迎登陆／注册</h2> <div class="loginForm"> <dl> <dt>用户名：</dt> <dd><input type="text" name="useName" /></dd> <dt>密 码：</dt> <dd><input type="text" name="useName" /></dd> <dt></dt> <dd><input type="checkbox" id="remember" name="remember" /><label for="remember">记住我的登陆状态</label></dd> <dt></dt> <dd><input type="button" name="button" value="登陆" /> <a href="#">忘记密码</a></dd> </dl> <hr /> 没有百度账号？<a href="#">立即注册百度账号</a> </div> </div> <div id="welcome"> <div id="welcome-top" class="top"> <img id="control-button" src="images/welcome_max.gif" onclick="Control()" /> </div> <div id="welcome-main" class="main"> <h4>百度知道是全球最大的问答型知识分享平台</h4> <ul> <li>提问题，排疑解惑</li> <li>答疑难，助人为乐</li> <li>搜知识，学习提高</li> <li>加团队，共同进步</li> </ul> <h4>我们真诚欢迎您的加入，分享属于您的精彩~！</h4> </div> </div> <div id="top" class="wrap"> <a href="#" onclick="showForm()">注册</a>｜<a href="#" onclick="showForm()">登录</a> </div> <div id="header" class="wrap"> <img src="images/logo-zhidao.gif" /> </div> <div id="content" class="wrap"> </div> </body>