var imagenumber = 5 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "images/wsaimage.jpg"
images[2] = "images/wsaimage1.jpg"
images[3] = "images/wsaimage2.jpg"
images[4] = "images/wsaimage3.jpg"
images[5] = "images/wsaimage4.jpg"
var image = images[rand1]