xml - xmlhttp request and querystring parameters -

i want create bookmark send parameter querystring such author=john smith inserted rails app, have far correct? providing find out how url parameters

function updatedata(param) {   var myurl = 'http://localhost:3000/app/book';    http.open("get", myurl + "?author=" + value-of-querystring-param, true);   http.onreadystatechange = usehttpresponse;   http.send(null);  } 

that looks should work, presuming usehttpresponse handler function.

one thing should encode parameter:

http.open("get", myurl + "?author=" + encodeuricomponent(param), true);