function erics_random_header_image() {
$location = '<img src="http://www.ericshefferman.com/wp-content/themes/';
$number = rand(1,12);
switch ($number){
    case 1:
        echo $location;
        echo 'gridfocus/images/game-adventure.jpg">';
        break;
    case 2:
        echo $location;
        echo 'gridfocus/images/game-atari-space-invaders.jpg">';
        break;
    case 3:
        echo $location;
        echo 'gridfocus/images/game-defender.jpg">';
        break;
    case 4:
        echo $location;
        echo 'gridfocus/images/game-donkey.jpg">';
        break;
    case 5:
        echo $location;
        echo 'gridfocus/images/game-frogger.jpg">';
        break;
    case 6:
        echo $location;
        echo 'gridfocus/images/game-galaga.jpg">';
        break;
    case 7:
        echo $location;
        echo 'gridfocus/images/game-joust.jpg">';
        break;
    case 8:
        echo $location;
        echo 'gridfocus/images/game-maze-craze.jpg">';
        break;
    case 9:
        echo $location;
        echo 'gridfocus/images/game-pac-man.jpg">';
        break;
    case 10:
        echo $location;
        echo 'gridfocus/images/game-pong.jpg">';
        break;
    case 11:
        echo $location;
        echo 'gridfocus/images/game-robotron.jpg">';
        break;
    case 12:
        echo '<a href="http://www.ericshefferman.com/to/pair_com_web_hosting">';
        echo '<img src="http://promote.pair.com/125x125.pl"></a>';
        break;
    }
}