array arguments in ksh

I'm writing a general function to process an array of strings, and I want that function to be able to receive the array as an argument.  Simple enough, right?  Well, given the following:

###########
function testit {
  echo $1 $2 $3
}

a[0]="hello world"
a[1]=goodbye

testit ${a[*]}
###########

this outputs:
hello world goodbye

Is there a way to pass in the *actual* array, and not the array elements joined by spaces?  I want to be able to recreate the array in the function, but the korn shell is a bit limited here...unless I'm missing something??

Thanks...