var theImages = new Array() // do not change this

theImages[0] = '/includes/navigators/left/images/tutbuttons/feattut-colibri.jpg'
theImages[1] = '/includes/navigators/left/images/tutbuttons/feattut-apotome.jpg'
theImages[2] = '/includes/navigators/left/images/tutbuttons/feattut-hbo100.jpg'
theImages[3] = '/includes/navigators/left/images/tutbuttons/feattut-lightpaths.jpg'
theImages[4] = '/includes/navigators/left/images/tutbuttons/feattut-opticalsect.jpg'
theImages[5] = '/includes/navigators/left/images/tutbuttons/feattut-mercspectrum.jpg'
theImages[6] = '/includes/navigators/left/images/tutbuttons/feattut-led.jpg'
theImages[7] = '/includes/navigators/left/images/tutbuttons/feattut-arclamp.jpg'
theImages[8] = '/includes/navigators/left/images/tutbuttons/feattut-coherence.jpg'


var theLinks = new Array() // do not change this

theLinks[0] = '/tutorials/colibri/index.html'
theLinks[1] = '/tutorials/apotome/index.html'
theLinks[2] = '/tutorials/hbolamp/index.html'
theLinks[3] = '/tutorials/axioobserver/index.html'
theLinks[4] = '/tutorials/apotomezstack/index.html'
theLinks[5] = '/tutorials/matchingfiltersets/index.html'
theLinks[6] = '/tutorials/leddiagram/index.html'
theLinks[7] = '/tutorials/arclampinstability/index.html'
theLinks[8] = '/tutorials/coherence/index.html'



var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var bannerID = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<a href="'+theLinks[bannerID]+'"><img src="'+theImages[bannerID]+'" border=0 alt="Featured Tutorial"></a>');
}