drivers seat wont stay up!

My Honda was rear-ended! Hooked it up w/a new bumper and arms but now I realize the driver seat is broke. It tilts from back to front fine, but w/ any weight on it if fall into the backseat (driver w/ it). Is there any fix to this, other than throwin in another seat or Viagra? Thanks

btw, it a fo door accord '93 lx