var imagenumber = 5 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "pix/random/10.jpg"
images[2] = "pix/random/11.jpg"
images[3] = "pix/random/20.jpg"
images[4] = "pix/random/21.jpg"
images[5] = "pix/random/22.jpg"
var image = images[rand1]