function pickimg(){
var imagenumber = 5 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1;
images = new Array
images[1] = "images/pic_home01.jpg"
images[2] = "images/pic_home02.jpg"
images[3] = "images/pic_home03.jpg"
images[4] = "images/pic_home04.jpg"
images[5] = "images/pic_home05.jpg"
var image = images[rand1]
document.randimg.src = image
}