Keys locked I locked my keys inside my car. is there any way to get the windows down or any of the doors open to get them out??

Doubtful. I'd recommend a good locksmith to come pop the lock for you fron the window channel. If you know what to look for, just roll down the window, find the lock linkage, and pop the lock yourself.

pull off and clean the central locking relay.but you may need to replace it.

All cars have two sets of key FOBs. Is your 2nd set in the house?

If the windows are down far enough to press the unlock button, can you also reach the door open handle? If so, reach in and open the door. (I must be missing something here).

Anyway, there are several videos on Youtube that show you how to open a locked car. Here are a few examples:
How to unlock your car in 30 seconds
Tricks to Unlocking Power Door When You Lock the Keys In Car Repair Tips
Car Opening

anytime you lock the door with the key fob or press the drivers door lock the alarm is on. if someone opens the door without the key the alarm will sound. test it by locking the door with the remote with the window down then after a min open door with the inside door handle by reaching in through window

try to ope the door by using a metallic string or something like the clothing hangers and on the edge do a small hook and put it between window pane and the black plastic blade next to the window pane and go down to the door lock of the driver's door and by finding the rod holing the door plastic knob for opening the door lift it up and the door will open. Good luck.

You might just need to reset it. Roll the drivers window down and close all the doors. Lock all the doors with the key ) turn the key to lock twice, The electric locks should lock all the doors. wail a few minutes and unlock and open the trunk with the key. relock the truck or just close it. unlock the drivers door with the key, twice. all the doors should unlock, get in and start the car. Now this does'nt always work. If it does'nt we'll make the system think it's running. Close and lock all the doors. open the hood and disconnect the battery, one ccable will be fine. wait a few minutes. Reach in though the open window and turn the key all the way on. Don't open the doors, go around and connect the battery hard so it does'nt jump or skip. Reach thought the window and start the car/ once it's running. turn it off remove the key and unlock the door from the inside and open the door ( as if you were inside.) get in and start the car and everything should be back to normal.

dis-connect your battery for 30 seconds to do a switch reset on your window, when you reconnect the batt your window will go down, open and close rear door to check lock functions ok first. close rear door and using key or switch inside car close window fully with out stopping, this should reset the window.

It is most likely a rod has fallen off inside the door. You may have to use a coat-hanger to read down inside and pull back on door latch to open it up.
Then after it is opened, remove screws on inner door panel, remove window/lock controls, take a big flat-head screwdriver and gently pry next to the plastic tabs holding on door panel. Remove door panel and put window back on track , and replace or reattach door handle rods.

make sure you dont have an extra key somewhere inside the car some newer cars have a chip inside the key that will unlock the doors if it is left inside

You need a body control computer, which controls the windows, door locks and other items. The new computer will have to be programed by a good imports shop or Nissan dealer.