var correctchoices=new Array()
correctchoices[1]='a'
correctchoices[2]='b'
correctchoices[3]='d'
correctchoices[4]='a'
correctchoices[5]='a'
correctchoices[6]='b'
correctchoices[7]='c'
correctchoices[8]='b'
correctchoices[9]='d'
correctchoices[10]='c'