Sample Odata Query CRM2011

function GetCity()
{
var serverUrl = "http://"+window.location.host+"/" + Xrm.Page.context.getOrgUniqueName();
  var id = Xrm.Page.getAttribute("new_courtid").getValue();
if(id!=null)
{
    var ODataPath = serverUrl + "/XRMServices/2011/OrganizationData.svc";

    var retrieveReq = new XMLHttpRequest();
//replace with your odata query
    var Odata = ODataPath + "/AccountSet?$select=new_city&$filter=accountId eq guid'" + id[0].id + "'";
    retrieveReq.open("GET", Odata, true);
    retrieveReq.setRequestHeader("Accept", "application/json");
    retrieveReq.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    retrieveReq.onreadystatechange = function () { retrieveReqCallBack(this); };
    retrieveReq.send();
}
}

function retrieveReqCallBack(retrieveReq) {

    if (retrieveReq.readyState == 4 /* complete */) {
        if (retrieveReq.status == 200) {
            var retrieved = JSON.parse(retrieveReq.responseText).d;
//replace attribute name as in the query
            var city= retrieved.results[0]["new_city"];
            Xrm.Page.data.entity.attributes.get('new_city').setValue(city.Value);
        }
        else {
            errorHandler(retrieveReq);
            alert("Unable to Retrieve City");
        }
    }
}