Script to retrieve single and multiple value lookup fields values using SharePoint 2010 Client Object Model for JavaScript (ECMAScript): var listName = "list name here" ; var listItemId = 23 ; // id here function retrieveLookupValues () { var clientContext = new SP . ClientContext . get_current (); var oList = clientContext . get_web (). get_lists (). getByTitle ( listName ); var selectedItems = SP . ListOperation . Selection . getSelectedItems (); var camlQuery = new SP . CamlQuery (); camlQuery . set_viewXml ( "< View >< Query >< Where >< Eq >< FieldRef Name='ID' / >< Value Type='Counter'>" + listItemId + "< /Value>< /Eq>< /Where>< /Query>< RowLimit>100< /RowLimit>< /View>" ); this . collListItem = oList . getItems ( camlQuery ); clientContext . load ( collListItem , 'Include(CustomSingelLookup...