javascript get array value

1var array = []
2array[0] = "hi"
3array[1] = "dude"
4var done = false
5while (done == false){
6var valueToFind = "hi";
7  var rounds = array.length;
8  if (rounds < 0){
9  return false
10  }
11  if (array[rounds] == valueToFind){
12  done = true
13    return rounds
14  }
15  rounds = rounds - 1
16}