Authenticating to Domino via Ajax in PhoneGap

How can my Native Android application login to Domino via Ajax?

I need to Authenticate to Domino to determine what access level, Roles, Author/Reader Fields are used.

function doDominoLogin(username, password) {
var logReq = createXHTMLHttpRequest() ;
var poststring = "RedirectTo=" + escape('yourdb.nsf/login.html') +
"&Username=" + username + "&password=" + password;
logReq.open("POST", "http://www.yoursite.com/names.nsf?Login" , false);
logReq.send(poststring);

alert(logReq.status);

alert(logReq.responseText);


if (logReq.status == 200){ return(true); } else { return(false);};
}

function createXHTMLHttpRequest() {
try { return new ActiveXObject("Msxml2.XMLHTTP") ; } catch (e) {}
try { return new ActiveXObject("Microsoft.XMLHTTP") ; } catch (e) {}
try { return new XMLHttpRequest() ; } catch (e) {}
alert("XMLHttpRequest is not supported on this browser!");
return null;
}