function defloat_predicate(elt, topelt)
{
	var cl = elt.getAttribute('class');
	var pcl = elt.parentNode.getAttribute('class');
	var st = window.getComputedStyle(elt, null);

	return (st.cssFloat != "none" || elt.sunk == topelt)
	    ? NodeFilter.FILTER_ACCEPT
	    : NodeFilter.FILTER_SKIP;
}

function author_predicate(elt, topelt)
{
	var cl = elt.getAttribute('class');

	if (elt.parentNode.parentNode != topelt)
		return NodeFilter.FILTER_SKIP;

	return (cl == "author")
	    ? NodeFilter.FILTER_ACCEPT
	    : NodeFilter.FILTER_SKIP;
}

function flip_predicate(elt, topelt)
{
	var cl = elt.getAttribute('class');
	var pcl = elt.parentNode.getAttribute('class');
	var st = window.getComputedStyle(elt, null);

	if (elt.parentNode.parentNode != topelt)
		return NodeFilter.FILTER_SKIP;

	if (cl == "placeholder")
		return NodeFilter.FILTER_ACCEPT;

	if (cl == "subject" || cl == "date" || cl == "to")
		return NodeFilter.FILTER_SKIP;

	if (cl == "author" && (pcl == "email" || pcl == "emailtop"))
		return NodeFilter.FILTER_SKIP;

	return (st.display == "block" || elt.flipped)
	    ? NodeFilter.FILTER_ACCEPT
	    : NodeFilter.FILTER_SKIP;
}

// From http://my.opera.com/GreyWyvern/blog/show.dml/1725165
Object.prototype.clone = function() {
	var c = (this instanceof Array) ? [] : {};
	for (i in this) {
		if (i == 'clone')
			continue;
		if (this[i] && typeof this[i] == "object") {
			c[i] = this[i].clone();
		} else
			c[i] = this[i];
	}
	return c;
};

function author_click()
{
	var topelt = this.parentNode.parentNode;
	var author_walker = document.createTreeWalker(topelt,
	    NodeFilter.SHOW_ELEMENT,
	    function (elt) { return author_predicate(elt, topelt); }, false);
	var float_walker = document.createTreeWalker(topelt,
	    NodeFilter.SHOW_ELEMENT,
	    function (elt) { return defloat_predicate(elt, topelt); }, false);
	var walker = document.createTreeWalker(topelt,
	    NodeFilter.SHOW_ELEMENT,
	    function (elt) { return flip_predicate(elt, topelt); }, false);
	var elt;
	var cl;
	var y;

	y = 0;
	if ((elt = author_walker.nextNode()) != null) {
		while (elt.offsetParent) {
			y += elt.offsetTop;
			elt = elt.offsetParent;
		}
	}

	elt = this;
	while (elt.offsetParent) {
		y -= elt.offsetTop;
		elt = elt.offsetParent;
	}

	window.scrollBy(0, y);

	while ((elt = float_walker.nextNode()) != null) {
		var t = {"cssFloat" : "none"};
		if (elt.sunk == null || elt.sunk == undefined) {
			elt.flippedfloat = {};
			for (var i in t) {
				elt.flippedfloat[i] = elt.style[i];
				elt.style[i] = t[i];
			}
			elt.sunk = topelt;
		} else if (elt.sunk == topelt) {
			for (var i in elt.flippedfloat)
				elt.style[i] = elt.flippedfloat[i];
			elt.sunk = null;
		}
	}
	while ((elt = walker.nextNode()) != null) {
		cl = elt.getAttribute('class');
		if (cl == "placeholder") {
			if (elt.style.display == "") {
				elt.style.display = "block";
			} else if (elt.style.display == "block") {
				elt.style.display = "";
			}
		} else if (cl == "container" || elt.tagName == "P") {
			if (elt.style.height === "") {
				var t = {"display" : "hidden", "height" : "0px", "overflow-y" : "hidden", "padding-top" : "0px", "padding-bottom" : "0px", "margin-top" : "0px", "margin-bottom" : "0px"};
				elt.flippedstyle = {};
				for (var i in t) {
					elt.flippedstyle[i] = elt.style[i];
					elt.style[i] = t[i];
				}
			} else {
				for (var i in elt.flippedstyle)
					elt.style[i] = elt.flippedstyle[i];
			}
		} else if (elt.style.display == "") {
			elt.style.display = "none";
		} else if (elt.style.display == "none") {
			elt.style.display = "";
		} else
			continue;
		elt.flipped = !elt.flipped;
	}
}

function author_divs_init()
{
	var elts = document.getElementsByTagName('DIV');
	var inited = 0, visited = 0;

	for (var i = 0; i < elts.length; i++) {
		var elt = elts[i];

		var eltclass = elt.getAttribute('class');

		visited++;

		if (eltclass == null)
			continue;

		if (eltclass != "author")
			continue;

		elt.addEventListener('click', author_click, false);

		inited++;
	}
}

document.addEventListener('DOMContentLoaded', author_divs_init, false);