Read operation in SharePoint 2010 REST

getListItemById.js

function getListItemById(webUrl,listName, itemId, success, failure) {
    var url = webUrl + "/_vti_bin/listdata.svc/" + listName + "(" + itemId + ")";
    $.ajax({
        url: url,
        method: "GET",
        headers: { "Accept": "application/json; odata=verbose" },
        success: function (data) {
            success(data.d);
        },
        error: function (data) {
            failure(data.responseJSON.error);
        }
    });
}


//Usage
getListItemById('https://contoso.sharepoint.com/project/','Tasks',2,function(taskItem){
    console.log(taskItem.TaskName); 
  },
  function(error){
    console.log(JSON.stringify(error));
  }
);

hi vgrem.

how can i set the user and password credentials? or how can i get the key to connect with this to a sharepoint server without anonymous access??

How using this code all items, here ony 1..((