function resizeImage()
{
	var window_height = document.body.clientHeight
	var window_width  = document.body.clientWidth
	var image_width   = document.getElementById('bkgImg').width
	var image_height  = document.getElementById('bkgImg').height
	var height_ratio  = image_height / window_height
	var width_ratio   = image_width / window_width
	if (height_ratio > width_ratio)
	{
		document.getElementById('bkgImg').style.width  = "auto"
		document.getElementById('bkgImg').style.height = "100%"
	}
	else
	{
		document.getElementById('bkgImg').style.width  = "100%"
		document.getElementById('bkgImg').style.height = "auto"
	}
}