h5页面 判断 移动端是ios、或者Android

var u = navigator.userAgent, app = navigator.appVersion; 
var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Linux') > -1; //android终端或者uc浏览器 
var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端

if(isAndroid){
	//Android 
}else {
	//ios			
}