gistfile1.js

function check (inboard, x, y){ 
    var board = inboard;
    for(var i = 1; i <= x; i++){
    for(var j = 1; j <= y; j++){
        var dot = 0;
        var guardman = 0;

        for(var k = -1; k < 2; k++){
        for(var l = -1; l < 2; l++){
            if(k == 0 && l == 0) continue;
            if(inboard[x + k][y + l] == 1) dot++;
            if(inboard[x + k][y + l] == 2) guardman++;
        }   
        }   

        if(board[x][y] == 0 && dot >= 3)
            board[x][y] == 1;
        if(board[x][y] == 1 && ( guardan >= 1 || dot <= 1 || dot >= 4))
            board[x][y] == 0;
    }   
    }   
    
    return board;
}