getId() don't get what setId() ?

I am testing a grid with 2 templates. I set the template's id by obj.setId("id"). But when I try to use that id by getCellTemplate().getId(), I couldn't get the id what I set. Following is my code:

var grid=new AW.UI.Grid;
grid.setHeaderText(["check","combo"]);
grid.setColumnCount(2);
grid.setRowCount(2);

var chk = new AW.Templates.CheckBox;
chk.setId("Check");
grid.setCellTemplate(chk, 0,0);

var combo=new AW.UI.Combo;
combo.setId("Combo");
combo.setControlText("Select");
combo.setItemText([1,2,3,4,5,6,7,8,9,0]);
combo.setItemCount(10);
grid.setCellTemplate(combo, 1,0);
grid.setCellText(grid.getCellTemplate(0,0).getId(),0,1);
grid.setCellText(grid.getCellTemplate(1,0).getId(),1,1);
document.write(grid);

Any idea?

Thanks,

Actually, I just want to know what the cell's template control is (combo or check). Is there any other way that can work around?

Thanks,