combo box doubt

Hi all I have a doubt in combo box

My cellIndex5 column is combo box column

I have to display Personal as a text in loading and to display it after selection as PC and as a second option Credit and to be displayed as CR after selection

myGrid.getCombo(5).put("Personal ","PC");
myGrid.getCombo(5).put("Credit","CR");

Please help me

thanks in advance

You are doing everything right.
Here is the tutorial about this method
http://docs.dhtmlx.com/doku.php?id=dhtmlxgrid:initialization_from_xml#managing_select_box_collection_co_coro_excells