// JavaScript Document

var bgimg = document.getElementById('bgimg');
var bgdiv = document.getElementById('bgdiv');

function bgresize() {
	var screenx = 0;
	var screeny = 0;
	if (self.innerHeight) {
		screenx = self.innerWidth;
		screeny = self.innerHeight;
	}
	// IE 6 Strict Mode
	else if (document.documentElement && document.documentElement.clientHeight) {
		screenx = document.documentElement.clientWidth;
		screeny = document.documentElement.clientHeight;
	}
	// other browsers
	else if (document.body) {
		screenx = document.body.clientWidth;
		screeny = document.body.clientHeight;
	}
	var ratiow = screenx / bgimg.width;
	var ratioh = screeny / bgimg.height;
	var ratio;
	//alert (" H"+screeny+" B"+screenx+" rh"+ratioh+" rb"+ratiow+" => "+ratio);
	(ratiow < ratioh) ? ratio = ratioh : ratio = ratiow;
	bgimg.height *= ratio;
	bgdiv.style.height = screeny;
}

bgimg.onload = bgresize;
window.onresize = bgresize;
window.onload = bgresize;