Export more layers?

[patrickpierson]

http://resources.arcgis.com/en/help/rest/apiref/export.html

dynamicLayers //This option was added at 10.1

Description: Use dynamicLayers parameter to modify the layer drawing order, change layer drawing info, and change layer data source version for this request. New layers (dataLayer) can also be added to the dynamicLayers based on the map service registered workspaces.

The order of dynamicLayers array defines the layer drawing order. The first element of the dynamicLayers array draws on top of all other layers.