Your window regulator is a cable-driven mechanism that's similar in design to 90% of the vehicles built today. The window slides up & down on a track, and is attached to a cable. The cable runs in a roughly triangular path, with the apexes at the top & bottom of the window track, and at the spool for the window motor. When the window motor operates, it spins the spool which pulls the cable in one direction or the other by wrapping or unwrapping the cable. The window moves up & down between the upper & lower guides (which are at the top & bottom apexes of the triangle) because it's connected to the moving cable. What usually happens is that one of the plastic cable guides breaks, allowing the cable to flop around & not move your window. If you hear the window motor operating when you press the switch, then you should be able to replace just the regulator & fix your problem. It's much easier to understand if you can locate a parts diagram, or just take your door apart & play with it for a while.