var imagenumber = 10 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "../images/heads/001.gif"
images[2] = "../images/heads/002.jpg"
images[3] = "../images/heads/003.jpg"
images[4] = "../images/heads/004.jpg"
images[5] = "../images/heads/005.jpg"
images[6] = "../images/heads/006.jpg"
images[7] = "../images/heads/007.jpg"
images[8] = "../images/heads/008.jpg"
images[9] = "../images/heads/009.jpg"
images[10] = "../images/heads/010.jpg"
var myimage = images[rand1]
document.write('<IMG src="' + myimage + '" width="763" height="124" ALT="The Trolleybus Museum at Sandtoft">')