Lots of people will respond and say "its time to get him a toddler bed" as it is a very common thing to read in parenting books - as the mother of a child who started climbing out of the crib at 13 months, putting a BABY in a toddler bed was the farthest thing from logical to me. That's just asking for sleepless nights and endless trauma for both yourselves and your child - a child will not stay in a toddler bed unless they are old enough to understand boundaries and why they need to stay in. A 14 month old can't really grasp that yet, I dont care how smart one thinks their child is. My daughter wasn't even climbing and falling out, but she climbed over the side and gently lowered herself to the floor....LOL. Most parents try to keep their children in their cribs until at least three, and I agree with that.
I ended up buying a crib tent, like comment number one mentioned. They sell them at babies r us, and it single handedly saved my life. My daughter just turned two yesterday, and we still use the tent and intend to until we feel she is mature enough to handle the responsibility of a big girl bed. In fact, she LOVES that tent - it makes her feel cozy, but is very tall and completely see through mesh. The mattress itself actually goes in the net and the tent part is over the top - it has helped us also, as when she was angry, she used to throw everything out of her crib and tantrum for hours as a ploy to get us in there - this tent eliminated that, and no she goes to bed quietly and happily with no fuss.