Sample code for retreiving data Through Odata in crm

function player()
 {

   var id = Xrm.Page.data.entity.attributes.get("ccs_playername2").getValue();
   alert(id[0].name);
   var serverUrl = "http://"+window.location.host+"/" + Xrm.Page.context.getOrgUniqueName();
   if(id!=null)
   {
     var ODataPath = serverUrl + "/XRMServices/2011/OrganizationData.svc";

     var retrieveReq = new XMLHttpRequest();
     //replace with your odata query
     var Odata = ODataPath + "/ccs_informationSet?$select=ccs_jersey&$filter=ccs_informationId 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) { 

  var retrieved =this.parent.JSON.parse(retrieveReq.responseText).d;     
  //for (i = 0; i < retrieved.results.length; i++) {

 // statecode = retrieved.results[i].ccs_jersey;

  //alert(statecode);

  //}

          
            var statecode = retrieved.results[0].ccs_jersey;
             alert(statecode);
             Xrm.Page.data.entity.attributes.get("ccs_jerseyno").setValue(statecode);
           }        
 }