$(document).ready(function() {
var zi = 1;
var EmptySquare = 9;
$.fn.extend({ fifteen:
function(square_size) {
var gameObjectElement = '#' + $(this).attr('id');
var sqSize = square_size + 'px';
var boardSize = (square_size * 1) + 'px';
$(gameObjectElement).html('<div id="board"></div>');
$('#board').css({ position:'absolute', width: boardSize, height: boardSize, border: '1px solid gray' });
for (var i = 0; i < 12; i++) {
$('#board').append("<div style='left: " + ((i % 3) * square_size) + "px; top: " + Math.floor(i / 4) * square_size + "px; width: " + square_size + "px; height: " + square_size + "px; background-position: " + (-(i % 4) * square_size) + "px " + -Math.floor(i / 4) * square_size + "px '></div>");
}
$('#board').children("div:nth-child(" + EmptySquare + ")").css({backgroundImage: "", background: "#ffffff"});
$('#board').children('div').click(function() {
Move(this, square_size);
});
}
});