var imagenumber = 6 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "images/pl30/hdim01.jpg"
images[2] = "images/pl30/hdim02.jpg"
images[3] = "images/pl30/hdim03.jpg"
images[4] = "images/pl30/hdim04.jpg"
images[5] = "images/pl30/hdim05.jpg"
images[6] = "images/pl30/hdim06.jpg"
var image = images[rand1]