images = new Array(4);

images[0] = "<img src='images/1.jpg' alt='picture displaying some of the activities' />";

images[1] = "<img src='images/2.jpg' alt='picture displaying some of the activities' />";

images[2] = "<img src='images/3.jpg' alt='picture displaying some of the activities' />";

images[3] = "<img src='images/4.jpg' alt='picture displaying some of the activities' />";

index = Math.floor(Math.random() * images.length);

images2 = new Array(4);

images2[0] = "<img src='images/5.jpg' alt='picture displaying some of the activities' />";

images2[1] = "<img src='images/6.jpg' alt='picture displaying some of the activities' />";

images2[2] = "<img src='images/7.jpg' alt='picture displaying some of the activities' />";

images2[3] = "<img src='images/8.jpg' alt='picture displaying some of the activities' />";

index2 = Math.floor(Math.random() * images.length);

images3 = new Array(4);

images3[0] = "<img src='images/9.jpg' alt='picture displaying some of the activities' />";

images3[1] = "<img src='images/10.jpg' alt='picture displaying some of the activities' />";

images3[2] = "<img src='images/11.jpg' alt='picture displaying some of the activities' />";

images3[3] = "<img src='images/12.jpg' alt='picture displaying some of the activities' />";

index3 = Math.floor(Math.random() * images.length);