images = new Array(4);

images[0] = "<img src='images/hires_panel.png' id='screenCap' />";
images[1] = "<img src='images/hires_panel2.png' id='screenCap' />";
images[2] = "<img src='images/hires_panel3.png' id='screenCap' />";
images[3] = "<img src='images/hires_panel4.png' id='screenCap' />";

index = Math.floor(Math.random() * images.length);

function randomImage() {
	document.write(images[index]);
}