加到对应页面的</body> 上面，或者<head> </head>之间
<script type="text/javascript"> var browser = { versions: function() { var u = navigator.userAgent, app = navigator.appVersion; return {//移动终端浏览器版本信息 trident: u.indexOf('Trident') > -1, //IE内核 presto: u.indexOf('Presto') > -1, //opera内核 webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核 gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核 mobile: !!u.match(/AppleWebKit.*Mobile.*/) || !!u.match(/AppleWebKit/), //是否为移动终端 ios: !!u.match(/(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端 android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器 iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //是否为iPhone或者QQHD浏览器 iPad: u.indexOf('iPad') > -1, //是否iPad webApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部 }; }(), language: (navigator.browserLanguage || navigator.language).toLowerCase() } function is_weixin() { var ua = navigator.userAgent.toLowerCase(); var isIosQQ = ( /(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent) && /sQQ/i.test(navigator.userAgent)); var isAndroidQQ = ( /(Android)/i.test(navigator.userAgent) && /MQQBrowser/i.test(navigator.userAgent) && /sQQ/i.test((navigator.userAgent).split('MQQBrowser'))); var isQQ = isIosQQ || isAndroidQQ; if (ua.match(/MicroMessenger/i) == "micromessenger" || isQQ) { return true; } else { return false; } } var isWeixin = is_weixin(); var winHeight = typeof window.innerHeight != 'undefined' ? window.innerHeight : document.documentElement.clientHeight; function loadHtml(){ var div = document.createElement('div'); div.id = 'weixin-tip'; if(browser.versions.ios || browser.versions.iPhone || browser.versions.iPad){ div.innerHTML = '<p><img style="80%" src="ios.png" alt="微信打开"/></p>'; }else if(browser.versions.android){ div.innerHTML = '<p><img style="80%" src="android.png" alt="微信打开"/></p>'; } document.body.appendChild(div); } function loadStyleText(cssText) { var style = document.createElement('style'); style.rel = 'stylesheet'; style.type = 'text/css'; try { style.appendChild(document.createTextNode(cssText)); } catch (e) { style.styleSheet.cssText = cssText; //ie9以下 } var head=document.getElementsByTagName("head")[0]; //head标签之间加上style样式 head.appendChild(style); } var cssText = "#weixin-tip{position: fixed; left:0; top:0; background: rgba(0,0,0,0.8); filter:alpha(opacity=80); 100%; height:100%; z-index: 100;} #weixin-tip p{text-align: center; margin-top: 10%; padding:0 5%;}"; if(isWeixin){ loadHtml(); loadStyleText(cssText); } </script>