function displayGame(){
    var game = $("iframe.game");
    if(!(game.length > 0)){
        $("<div class=\"game-overlay\"></div>").appendTo("body");
        $("<div class=\"game-close\"></div>").appendTo("body");
        $("<iframe class=\"game\" src=\"/game.html\" frameborder=\"0\" scrolling=\"no\" marginwidth=\"0\" marginheight=\"0\"></iframe>").appendTo("body");
        game = $("iframe.game");
    }
    
    game.css("top",50);
    game.css("left",($(document).width() - game.width()) / 2);
    game.show();
    
    var close = $("div.game-close");
    close.css("top",50);
    close.css("left",$(document).width()/2 + game.width()/2 + 2);
    close.mousedown(function(){
        closeGame();
    });
    close.show();
    
    var overlay = $("div.game-overlay");
    overlay.width($(document).width() + 24);
    overlay.height($(document).height());
    overlay.mousedown(function(){
        closeGame();
    });
    overlay.show();
    
    $(document.body).css("overflow","hidden");
}

function closeGame(){
    $("iframe.game").css("display","none");
    $("div.game-close").css("display","none");
    $("div.game-overlay").css("display","none");
    $(document.body).css("overflow","visible");
}