jQuery Grid Plugin - jqGrid

Hello,

I first want to apologize for my English language because i'm not used to write in English (i'm French).

I heard about this amazing javascript plug-in for jquery and i'd like to know one thing:

I'd like to make a grid for an administration console which ask the server periodically and retrieve the command made by customer (on an e-commerce website) and especially the products they buy which are display in a column called “products”:

the problem is that if a customer by 2 or more products I don't want to create two rows for this same person (where only the product's column change). So I thought I create a row with all the informations on the person and in the column products write see below inside and when clicking on this cell, new rows are display (as many as products bought) with an effect (show and hide).

The problem is that I'm a newbie in jquery and especially in this plug-in.

Do somebody understand my problem and maybe have an idea to make this?

I found a way to do this with subgrid but one other problem is that I only would to display the "+" if there is a subgrid (this include that the subgrid is loaded in the same time as the parent grid).

Is it possible?