<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .box{ background-color: #4cae4c; width:700px; height:600px; } .preloader{ position:fixed; top:0; bottom:0; left:0; right:0; z-index:999; height:100%; width:100%; background-color: #fefefe; overflow: hidden !important; } .loaded{ width:60px; height:60px; position:absolute; top:50%; left:50%; margin-top:-30px; /*高度的一半*/ margin-left:-30px;/*宽度的一半*/ background-image: url('assets/images/loading.gif'); background-repeat:no-repeat; background-position: center; -moz-background-size: cover; background-size: cover; } </style> </head> <body> <div class="preloader"> <div class="loaded"></div> </div> <div class="box">我是遮罩层下面的内容</div> </body> <script> /**利用js*页面加载完毕，关闭遮罩层***/ jQuery(document).ready(function ($) { $(window).load(function () { $(".loaded").fadeOut(); $(".preloader").delay(1000).fadeOut("slow"); }); }); </script> </html>