Simple Array question

Hi, If i am posting something like this from a form: <input type=checkbox name='id[sh1]' value=3> <input type=checkbox name='id[sh2]' value=4> How do i get the value of id[]? eg: I dont want the "sh1" and "sh2", i just want the "3" and "4" The reason i dont wan the sh1 and sh2 is those are dynamic and will be changing, I just need the values (in this case 3 and 4) to do some comparasion and assignment operations Kindly reply. Thank, -Ryan