// JavaScript Document
if(document.addEventListener) {
	document.addEventListener("DOMContentLoaded", getImage, false);
} else {
	window.onload = getImage;
}

function getImage() {
	var  num = Math.ceil(Math.random() * (3));
	
	if(1 <= num <= 3) {
		document.getElementById('headerIMG').src = 'images/marquee'+num+'.jpg';
	} else {
		document.getElementById('headerIMG').src = 'images/marquee1.jpg';
	}
}