JavaScript client 如何获取 Telerik RadGrid的值

网上很多代码用不成，下面这段代码经验证可用：

Java代码  

var MasterTable = grid.get_masterTableView();  
var selectedRows = MasterTable.get_selectedItems();  
var row = selectedRows[0];  
var cell = MasterTable.getCellByColumnUniqueName(row, "ID");  
cell = cell.innerHTML;