<!--
var imagenumber = 4 ; 
var randomnumber = Math.random() ; 
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ; 
images = new Array 
images[1] = "/gfx/layout/ban01.jpg"
images[2] = "/gfx/layout/ban02.jpg"
images[3] = "/gfx/layout/ban03.jpg"
images[4] = "/gfx/layout/ban04.jpg"
var myimage = images[rand1] 
document.write('<a href="/index.php"><img src="' + myimage + '" border="0"></a>') 
//-->