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Accessing to grid in iframe loaded in accordion's cell.

Dear support,

An other small problem for me with an iframe in a accordion's cell (loaded with attachURL(...)).
Everything works fine, and I have a grid correctly loaded in the iframe and so on ... , and can access to "HTML objects" with some "classical" method like "getElementById(...) for example.
But I would like to access to my dhtmlxGrid for it's properties and methods, like:
"
accordion.cells("my_cell")._frame.the_grid.getCheckedRows(1);

"
It might be a misunderstanding from myself of simple javascript technic, sorry, but I don't know how to access to the grid directly.
I've tried things like:
"
accordion.cells("my_cell")._frame.contentWindow.the_grid.getCheckedRows(1);
"
Etc ...

Thanks,
Regards,
vinc.

If grid was created as

the_grid = new dhtmlXGridObject(...
or 
the_grid = some_obj.attachGrid(...

then used syntax is correct 
        accordion.cells("my_cell")._frame.contentWindow.the_grid

Beware that if grid object was defined as "var the_grid" inside some kind of function ( not on top level ) - it will be visible only inside this function and not visible for any other scripts. 

Hi,
That was it -> " object was defined as "var the_grid" inside some kind of function ".
So, I found a solution and change the code in order to be able to get the grid.

Many thanks,
vinc.