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
1 <!DOCTYPE html> 2 <html lang="zh-CN"> 3 <head> 4 <meta charset="utf-8"> 5 <meta http-equiv="X-UA-Commpatible" content="IE=edge"> 6 <title>HTML遮罩层</title> 7 <link rel="stylesheet" href="css/index.css"> 8 </head> 9 <body>10 <div class="header" id="header">11 <div class="title-outer">12 <span class="title">13 HTML遮罩层使用14 </span>15 </div>16 </div>17 <div class="body" id="body">18 <iframe id="iframeRight" name="iframeRight" width="100%" height="100%"19 scrolling="no" frameborder="0"20 style="border: 0px;margin: 0px; padding: 0px; width: 100%; height: 100%;overflow: hidden;"21 onload="rightIFrameLoad(this)" src="body.html"></iframe>22 </div>23 24 <!-- 遮罩层DIV -->25 <div id="overlay" class="overlay"></div>26 <!-- Loading提示 DIV -->27 <div id="loadingTip" class="loading-tip">28 <img src="/static/imghwm/default1.png" data-src="images/loading.gif" class="lazy" / alt="在HTML中实现和使用遮罩层_html/css_WEB-ITnose" >29 </div>30 31 <!-- 模拟模态窗口DIV -->32 <div class="modal" id="modalDiv"></div>33 34 <script type='text/javascript' src="js/jquery-1.10.2.js"></script>35 <script type="text/javascript" src="js/index.js"></script>36 </body>37 </html>
index.css
1 * { 2 margin: 0; 3 padding: 0; 4 } 5 6 html, body { 7 width: 100%; 8 height: 100%; 9 font-size: 14px;10 }11 12 div.header {13 width: 100%;14 height: 100px;15 border-bottom: 1px dashed blue;16 }17 18 div.title-outer {19 position: relative;20 top: 50%;21 height: 30px;22 }23 span.title {24 text-align: left;25 position: relative;26 left: 3%;27 top: -50%;28 font-size: 22px;29 }30 31 div.body {32 width: 100%;33 }34 .overlay {35 position: absolute;36 top: 0px;37 left: 0px;38 z-index: 10001;39 display:none;40 filter:alpha(opacity=60);41 background-color: #777;42 opacity: 0.5;43 -moz-opacity: 0.5;44 }45 .loading-tip {46 z-index: 10002;47 position: fixed;48 display:none;49 }50 .loading-tip img {51 width:100px;52 height:100px;53 }54 55 .modal {56 position:absolute;57 width: 600px;58 height: 360px;59 border: 1px solid rgba(0, 0, 0, 0.2);60 box-shadow: 0px 3px 9px rgba(0, 0, 0, 0.5);61 display: none;62 z-index: 10003;63 border-radius: 6px;64 } index.js
1 function rightIFrameLoad(iframe) { 2 var pHeight = getWindowInnerHeight() - $('#header').height() - 5; 3 4 $('div.body').height(pHeight); 5 console.log(pHeight); 6 7 } 8 9 // 浏览器兼容 取得浏览器可视区高度 10 function getWindowInnerHeight() { 11 var winHeight = window.innerHeight 12 || (document.documentElement && document.documentElement.clientHeight) 13 || (document.body && document.body.clientHeight); 14 return winHeight; 15 16 } 17 18 // 浏览器兼容 取得浏览器可视区宽度 19 function getWindowInnerWidth() { 20 var winWidth = window.innerWidth 21 || (document.documentElement && document.documentElement.clientWidth) 22 || (document.body && document.body.clientWidth); 23 return winWidth; 24 25 } 26 27 /** 28 * 显示遮罩层 29 */ 30 function showOverlay() { 31 // 遮罩层宽高分别为页面内容的宽高 32 $('.overlay').css({'height':$(document).height(),'width':$(document).width()}); 33 $('.overlay').show(); 34 } 35 36 /** 37 * 显示Loading提示 38 */ 39 function showLoading() { 40 // 先显示遮罩层 41 showOverlay(); 42 // Loading提示窗口居中 43 $("#loadingTip").css('top', 44 (getWindowInnerHeight() - $("#loadingTip").height()) / 2 + 'px'); 45 $("#loadingTip").css('left', 46 (getWindowInnerWidth() - $("#loadingTip").width()) / 2 + 'px'); 47 48 $("#loadingTip").show(); 49 $(document).scroll(function() { 50 return false; 51 }); 52 } 53 54 /** 55 * 隐藏Loading提示 56 */ 57 function hideLoading() { 58 $('.overlay').hide(); 59 $("#loadingTip").hide(); 60 $(document).scroll(function() { 61 return true; 62 }); 63 } 64 65 /** 66 * 模拟弹出模态窗口DIV 67 * @param innerHtml 模态窗口HTML内容 68 */ 69 function showModal(innerHtml) { 70 // 取得显示模拟模态窗口用DIV 71 var dialog = $('#modalDiv'); 72 73 // 设置内容 74 dialog.html(innerHtml); 75 76 // 模态窗口DIV窗口居中 77 dialog.css({ 78 'top' : (getWindowInnerHeight() - dialog.height()) / 2 + 'px', 79 'left' : (getWindowInnerWidth() - dialog.width()) / 2 + 'px' 80 }); 81 82 // 窗口DIV圆角 83 dialog.find('.modal-container').css('border-radius','6px'); 84 85 // 模态窗口关闭按钮事件 86 dialog.find('.btn-close').click(function(){ 87 closeModal(); 88 }); 89 90 // 显示遮罩层 91 showOverlay(); 92 93 // 显示遮罩层 94 dialog.show(); 95 } 96 97 /** 98 * 模拟关闭模态窗口DIV 99 */100 function closeModal() {101 $('.overlay').hide();102 $('#modalDiv').hide();103 $('#modalDiv').html('');104 } body.html
1 <!DOCTYPE html> 2 <html lang="zh-CN"> 3 <head> 4 <meta charset="utf-8"> 5 <meta http-equiv="X-UA-Commpatible" content="IE=edge"> 6 <title>body 页面</title> 7 <style type="text/css"> 8 * { 9 margin: 0;10 padding: 0;11 }12 13 html, body {14 width: 100%;15 height: 100%;16 }17 18 .outer {19 width: 200px;20 height: 120px;21 position: relative;22 top: 50%;23 left: 50%;24 }25 26 .inner {27 width: 200px;28 height: 120px;29 position: relative;30 top: -50%;31 left: -50%;32 }33 34 .button {35 width: 200px;36 height: 40px;37 position: relative;38 }39 40 .button#btnShowLoading {41 top: 0;42 }43 44 .button#btnShowModal {45 top: 30%;46 }47 48 </style>49 <script type="text/javascript">50 51 function showOverlay() {52 // 调用父窗口显示遮罩层和Loading提示53 window.top.window.showLoading();54 55 // 使用定时器模拟关闭Loading提示56 setTimeout(function() {57 window.top.window.hideLoading();58 }, 3000);59 60 }61 62 function showModal() {63 // 调用父窗口方法模拟弹出模态窗口64 window.top.showModal($('#modalContent').html());65 }66 67 </script>68 </head>69 <body>70 <div class='outer'>71 <div class='inner'>72 <button id='btnShowLoading' class='button' onclick='showOverlay();'>点击弹出遮罩层</button>73 <button id='btnShowModal' class='button' onclick='showModal();'>点击弹出模态窗口</button>74 </div>75 </div>76 77 <!-- 模态窗口内容DIV，将本页面DIV内容设置到父窗口DIV上并模态显示 -->78 <div id='modalContent' style='display: none;'>79 <div class='modal-container' style='width: 100%;height: 100%;background-color: white;'>80 <div style='width: 100%;height: 49px;position: relative;left: 50%;top: 50%;'>81 <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>82 </div>83 <button class='btn-close' style='width: 100px; height: 30px; position: absolute; right: 30px; bottom: 20px;'>关闭</button>84 </div>85 </div>86 <script type='text/javascript' src="js/jquery-1.10.2.js"></script>87 </body>88 </html> 运行结果
初始化
显示遮罩层和Loading提示
显示遮罩层和模拟弹出模态窗口
END
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