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

theImages[0] = 'summer/img/header1.jpg'
theImages[1] = 'summer/img/header2.jpg'
theImages[2] = 'summer/img/header3.jpg'
theImages[3] = 'summer/img/header4.jpg'
theImages[4] = 'summer/img/header5.jpg'
theImages[5] = 'summer/img/header6.jpg'
theImages[6] = 'summer/img/header7.jpg'
theImages[7] = 'summer/img/header8.jpg'
theImages[8] = 'summer/img/header9.jpg'
theImages[9] = 'summer/img/header10.jpg'

// ======================================
// do not change anything below this line
// ======================================

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 whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'">');
}