go and get some 5 minute epoxy (the clear stuff)
mix the epoxy and put it on the outside 1/2 inch of the window (as not to get it near the ede you will see) then take and put a few pieces of duct tape on the inside to hold it on place to wait for it to dry hey as they say
if you can't fix it duck it
if you cant duck it f_ _k it.
then lay it on a flat surface and put a heavy weight on top(stack of phone books or a case of beer) and wair overnight for it to dry, and if it drys good then throw a party and drink the beer (after refrigerating a couple hours of course)