global open_list = [];
global closed_list = [];
function dijkstra(cell1, cell2)
{
    push(open_list, getCell());
    while (count(open_list) > 0)
    {
        var current = shift(open_list);
        if (!inArray(closed_list, current))
        {
            push(closed_list, current);
            pushAll(open_list, getNearestCells(current));
        }
    }
}

function getNearestCells(cell)
{
    var x = getCellX(cell);
    var y = getCellY(cell);
    return [getCellFromXY(x + 1, y + 1),
            getCellFromXY(x + 1, y - 1),
            getCellFromXY(x - 1, y + 1),
            getCellFromXY(x - 1, y - 1)];
}