[web2py] Re: in link i will post a string

[pk]

my js:
var button = "Anmelden";
            console.log(button);
            $.ajax({ url: "{{=URL(r=request,c='default',f='user')}}",
button: button });

my default-controller:
return(request.vars.button)

but why is the return value: none ??

thanks