These are usually glued in. You'll need a new window of course along with the urethane type glue. They are about $15 a tube. You'll have to get al the old glass out then scrape all the stuff off the sheetmetal, once it's cleaned off you'll have to get a primer also for the glue then reglue the body, not the window. Install the window and hold it in place with DUCT tape overnight if possible.