btnclick event work inside a grid

how btnclick event work inside a grid

i wrote this to get buttons every row in a grid.button comes inside the grid but 1 extra button appears top of the grid.untill i clicked the top buuton other button inside the grid doesn't work.pls help me

var btnSave=new AW.UI.Button;
grid.setCellTemplate(btnSave,3);
btnSave.setId("Save");
btnSave.setControlText("Save");
btnSave.setSize(50);
btnSave.refresh();
btnSave.onControlClicked=function(){

};
document.write(btnSave);