That was just an example, change it to fit your needs
What you want to do seems simple enough,
PHP Code:
temp.board= {25 values};
temp.board.sortdescending();
// add a new entry
temp.newEntry = 123;
temp.lowest = temp.board[temp.board.size()-1];
if(temp.newEntry > temp.lowest) {
// delete lowest
// add to board
// re-sort
}
// display or whatever
I can whip up another example later tonight if needed.