var myImages = new Array();

myImages[0] = 'images/header_graphic_000.jpg';
myImages[1] = 'images/header_graphic_001.jpg';
myImages[2] = 'images/header_graphic_002.jpg';
myImages[3] = 'images/header_graphic_003.jpg';
myImages[4] = 'images/header_graphic_005.jpg';
myImages[5] = 'images/header_graphic_007.jpg';
myImages[6] = 'images/header_graphic_009.jpg';
myImages[7] = 'images/header_graphic_013.jpg';

var j = 0
var p = myImages.length;

var whichImage = Math.round(Math.random()*(p-1));

function showImage(){
	document.write('<img src="'+myImages[whichImage]+'" width="945" height="190" style="display: block" alt="" />');
}