HTML实现遮罩层的方法 HTML中如何使用遮罩层

Web页面中使用遮罩层，可防止重复操作，提示loading；也可以模拟弹出模态窗口。

实现思路：

一个DIV作为遮罩层，一个DIV显示loading动态GIF图片。在下面的示例代码中，同时展示了如何在iframe子页面中调用显示和隐藏遮罩层。

示例代码：

index.html

XML/HTML Code复制内容到剪贴板 <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Commpatible" content="IE=edge"> <title>HTML遮罩层</title> <link rel="stylesheet" href="css/index.css"> </head> <body> <div class="header" id="header"> <div class="title-outer"> <span class="title"> HTML遮罩层使用 </span> </div> </div> <div class="body" id="body"> <iframe id="iframeRight" name="iframeRight" width="100%" height="100%" scrolling="no" frameborder="0" style="border: 0px;margin: 0px; padding: 0px; width: 100%; height: 100%;overflow: hidden;" onload="rightIFrameLoad(this)" src="body.html"></iframe> </div>  <div id="overlay" class="overlay"></div>  <div id="loadingTip" class="loading-tip"> <img src="images/loading.gif" /> </div>  <div class="modal" id="modalDiv"></div> <script type=text/javascript src="js/jquery-1.10.2.js"></script> <script type="text/javascript" src="js/index.js"></script> </body> </html>

index.css

CSS Code复制内容到剪贴板 * { margin: 0; padding: 0; } html, body { width: 100%; height: 100%; font-size: 14px; } div.header { width: 100%; height: 100px; border-bottom: 1px dashed blue; } div.title-outer { position: relative; top: 50%; height: 30px; } span.title { text-align: left; position: relative; left: 3%; top: -50%; font-size: 22px; } div.body { width: 100%; } .overlay { position: absolute; top: 0px; left: 0px; z-index: 10001; display:none; filter:alpha(opacity=60); background-color: #777; opacity: 0.5; -moz-opacity: 0.5; } .loading-tip { z-index: 10002; position: fixed; display:none; } .loading-tip img { width:100px; height:100px; } .modal { position:absolute; width: 600px; height: 360px; border: 1px solid rgba(0, 0, 0, 0.2); box-shadow: 0px 3px 9px rgba(0, 0, 0, 0.5); display: none; z-index: 10003; border-radius: 6px; }

index.js

JavaScript Code复制内容到剪贴板 function rightIFrameLoad(iframe) { var pHeight = getWindowInnerHeight() - $(#header).height() - 5; $(div.body).height(pHeight); console.log(pHeight); } // 浏览器兼容取得浏览器可视区高度 function getWindowInnerHeight() { var winHeight = window.innerHeight || (document.documentElement && document.documentElement.clientHeight) || (document.body && document.body.clientHeight); return winHeight; } // 浏览器兼容取得浏览器可视区宽度 function getWindowInnerWidth() { var winWidth = window.innerWidth || (document.documentElement && document.documentElement.clientWidth) || (document.body && document.body.clientWidth); return winWidth; } /** * 显示遮罩层 */ function showOverlay() { // 遮罩层宽高分别为页面内容的宽高 $(.overlay).css({height:$(document).height(),width:$(document).width()}); $(.overlay).show(); } /** * 显示Loading提示 */ function showLoading() { // 先显示遮罩层 showOverlay(); // Loading提示窗口居中 $("#loadingTip").css(top, (getWindowInnerHeight() - $("#loadingTip").height()) / 2 + px); $("#loadingTip").css(left, (getWindowInnerWidth() - $("#loadingTip").width()) / 2 + px); $("#loadingTip").show(); $(document).scroll(function() { return false; }); } /** * 隐藏Loading提示 */ function hideLoading() { $(.overlay).hide(); $("#loadingTip").hide(); $(document).scroll(function() { return true; }); } /** * 模拟弹出模态窗口DIV * @param innerHtml 模态窗口HTML内容 */ function showModal(innerHtml) { // 取得显示模拟模态窗口用DIV var dialog = $(#modalDiv); // 设置内容 dialog.html(innerHtml); // 模态窗口DIV窗口居中 dialog.css({ top : (getWindowInnerHeight() - dialog.height()) / 2 + px, left : (getWindowInnerWidth() - dialog.width()) / 2 + px }); // 窗口DIV圆角 dialog.find(.modal-container).css(border-radius,6px); // 模态窗口关闭按钮事件 dialog.find(.btn-close).click(function(){ closeModal(); }); // 显示遮罩层 showOverlay(); // 显示遮罩层 dialog.show(); } /** * 模拟关闭模态窗口DIV */ function closeModal() { $(.overlay).hide(); $(#modalDiv).hide(); $(#modalDiv).html(); }

body.html

XML/HTML Code复制内容到剪贴板 <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Commpatible" content="IE=edge"> <title>body 页面</title> <style type="text/css"> * { margin: 0; padding: 0; } html, body { width: 100%; height: 100%; } .outer { width: 200px; height: 120px; position: relative; top: 50%; left: 50%; } .inner { width: 200px; height: 120px; position: relative; top: -50%; left: -50%; } .button { width: 200px; height: 40px; position: relative; } .button#btnShowLoading { top: 0; } .button#btnShowModal { top: 30%; } </style> <script type="text/javascript"> function showOverlay() { // 调用父窗口显示遮罩层和Loading提示 window.top.window.showLoading(); // 使用定时器模拟关闭Loading提示 setTimeout(function() { window.top.window.hideLoading(); }, 3000); } function showModal() { // 调用父窗口方法模拟弹出模态窗口 window.top.showModal($(#modalContent).html()); } </script> </head> <body> <div class=outer> <div class=inner> <button id=btnShowLoading class=button onclick=showOverlay();>点击弹出遮罩层</button> <button id=btnShowModal class=button onclick=showModal();>点击弹出模态窗口</button> </div> </div>  <div id=modalContent style=display: none;> <div class=modal-container style=width: 100%;height: 100%;background-color: white;> <div style=width: 100%;height: 49px;position: relative;left: 50%;top: 50%;> <span style=font-size: 36px; width: 100%; text-align:center; display: inline-block; position:inherit; left: -50%;top: -50%;>模态窗口1</span> </div> <button class=btn-close style=width: 100px; height: 30px; position: absolute; right: 30px; bottom: 20px;>关闭</button> </div> </div> <script type=text/javascript src="js/jquery-1.10.2.js"></script> </body> </html>