var pictures = new Array
(
 "images/sports/surf.gif",
 "images/sports/crisket.gif",
 "images/sports/run.gif",
 "images/sports/rugby.gif",
 "images/sports/boxing.gif",
 "images/sports/ski.gif",
 "images/sports/golf.gif",
 "images/sports/martial_arts.gif",
 "images/sports/horse.gif",
 "images/sports/athletics.gif",
 "images/sports/soccer.gif",
 "images/sports/bowling.gif",
 "images/sports/hockey.gif",
 "images/sports/gymnastics.gif",
 "images/sports/basketball.gif",
 "images/sports/tennis.gif",
 "images/sports/bike.gif"
);

function setSportPic() 
{
 w = Math.random();
 x = Math.round(w * pictures.length);
 var pic = document.getElementById('sportpic');
 if (x > pictures.length - 1) x = pictures.length - 1;
 pic.src = pictures[x];
}