js判断手机是否安装某款app，有则打开，没有去下载
转载于：https://www.cnblogs.com/wanan-01/p/9914531.htmlfunction openApp(){ if(navigator.userAgent.match(/(iPhone|iPod|iPad);?/i)) { var loadDateTime = new Date(); window.setTimeout(function() { var timeOutDateTime = new Da
