var theImages = new Array() 

theImages[0] = 'images/feature_image_01.jpg"'
theImages[1] = 'images/feature_image_02.jpg"'
theImages[2] = 'images/feature_image_03.jpg"'
theImages[3] = 'images/feature_image_04.jpg"'
theImages[4] = 'images/feature_image_05.jpg"'
theImages[5] = 'images/feature_image_06.jpg"'

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]+'" alt="The Hog Masters" />');
}