/*
 * OK, this is not really a parallax... I just want to see my content move
 * somewhat faster than the background... hey, ho, let's go
 */
var content, content_top, content_left, content_width, content_height;
var width_delta, height_delta;

function init() {
	content = document.getElementById("content");
	content_top = parseFloat(window.getComputedStyle(content).top);
	content_left = parseFloat(window.getComputedStyle(content).left);
	content_width = parseFloat(window.getComputedStyle(content).width);
	content_height = parseFloat(window.getComputedStyle(content).height);

	var body = document.body,
			html = document.documentElement;

	var doc = Math.max(
			body.scrollHeight,
			body.offsetHeight,
			html.clientHeight,
			html.scrollHeight,
			html.offsetHeight);

	height_delta = (doc-window.innerHeight)/2;

	doc = Math.max(
			body.scrollWidth,
			body.offsetWidth,
			html.clientWidth,
			html.scrollWidth,
			html.offsetWidth);

	width_delta = (doc-window.innerWidth)/2;

	window.scrollTo(width_delta, height_delta);
}

function parallax() {
	if (! document.documentElement) return;

	var v_scroll =
		(document.documentElement
		 && document.documentElement.scrollTop)
		|| document.body.scrollTop;

	var h_scroll =
		(document.documentElement
		 && document.documentElement.scrollLeft)
		|| document.body.scrollLeft;

	content.style.left = content_left - ((h_scroll - width_delta)/16);
	content.style.top = content_top - ((v_scroll - height_delta)/16);
}
// vim: set ts=2 sw=2: