[OpenLayers-Users] Prevent requests for hidden layers?

[mortac8]

Is there any way to prevent OpenLayers from requesting map tiles from hidden
layers when panning or zooming?  Our users generally use 1 base layer with
4-5 layers that they toggle-on sparingly.  The network performance isn't
great so all the requests for the 4-5 layers (even if hidden) really bog
things down.  

Any thoughts on how to address this?  We are on OpenLayers 2.12.  

Thanks!!
Ashley



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