<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> </body> </html> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> body{ background: black; } @keyframes snow{ 0% { background-position: 0 0, 0 0; } 100% { background-position: 500px 1000px, 500px 500px; } } @-webkit-keyframes snow{ 0% { background-position: 0 0, 0 0; } 100% { background-position: 500px 1000px, 500px 500px; } } #snowMask { position: fixed; left: 0; top: 0; right: 0; bottom: 0; z-index: 999; background: url('http://2013.miaov.com/2013/img/snow1.png'),url('http://2013.miaov.com/2013/img/snow2.png'); pointer-events: none; -webkit-animation: snow 15s linear infinite; animation: snow 15s linear infinite; } </style> <script type="text/javascript"> (function(){ var snowMask = document.querySelector('#snowMask'); function isIE() { if (!!window.ActiveXObject || "ActiveXObject" in window) return true; else return false; } snowMask.style.display = (!isIE())?"block":"none"; })(); </script> </head> <body> <div id="snowMask" style="display: block;"></div> </body> </html>