(Steve goes and checks)
Ah... I should have checked before. Actually, the 'ds' gtype code is used internally to the script. But, now I come to check, the script won't let you pass this as a parameter since it is not a valid standalone type -- dwmys is valid, but only for a full page, not for an individual graph. Internally, this is broken down to 4 requests for ds, ws, ms and ys. This was not a problem until you needed to be able to request just a graph without a legend
You could add it to the list of valid gtypes, however this would then result in it appearing in the Types menu.
I guess you want this for use in popup frames over a network map?
This won't be an easy one to get around after all, as I need some way to bypass the tests.... watch this space....