// JavaScript Document

function set_background() {
	if (screen.width <= 800) { 							document.body.style.backgroundImage = 'url(images/bg_800.jpg)'; }
	if (screen.width > 800 && screen.width <= 1024) { 	document.body.style.backgroundImage = 'url(images/bg_1024.jpg)'; }
	if (screen.width > 1024 && screen.width <= 1280) { 	document.body.style.backgroundImage = 'url(images/bg_1280.jpg)'; }
	if (screen.width > 1280) { 							document.body.style.backgroundImage = 'url(images/bg_1600.jpg)'; }
}