js判断移动端是Android登录还是iPhone登录

//js判断是Android登录还是iPhone登录
function getSystem(){
var useragent = navigator.userAgent.toUpperCase();
if(useragent.indexOf('iPod')>-1 || useragent.indexOf('iPhone')>-1 || useragent.indexOf('IPHONE')>-1){
return "iPhone";
}else{
return "Android";
}
}

js判断是Android登录还是iPhone登录

function _login(){
var txtName=$("#txtName").val();
var txtPass=$("#txtPass").val();
if(getSystem()=="Android"){
window.Android.login(txtName,txtPass);
}
$("#LogonForm").submit();
}