Javascript API - Reading offscreen record

Hi

I am trying to retrieve an off-screen record and do some validation on this.

can you please check whether i have given in the right format.

var callback=function(request,response){

  var status = response.status;

  if (status == "OK"){

  var _osf = response.getFieldValue("OffScreenField");

  alert("Off Screen Field value : " + _osf);

  if(_osf == "Yes")

  {

  //do something

  }

  }

  else {

  alert("error " + response.errors);

  }

  };

oraclecrmod.datasvc.readRecord("Account","OffScreenField",{searchType:"rowId","rowId":"1QA2-TNRWW"},callback);

thank you