var imagenumber = 3 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "./images/teaser/teaser1.jpg"
images[2] = "./images/teaser/teaser2.jpg"
images[3] = "./images/teaser/teaser3.jpg"
var image = images[rand1]