document.observe("dom:loaded", function() {	
	// HORIZONTAL RULES
	// nest the <hr> element into a div container for customization via CSS
	// unless it has already been nested in a div with "HorzRule" class name
	var allHorzRules = $$("hr");
	allHorzRules.each(function (hr) {
		var parentNode = hr.up();
		if (!(parentNode.tagName.toLowerCase() == "div" && parentNode.hasClassName("HorzRule"))) {
			$(hr).wrap("div", { "class": "HorzRule" });
		}
	});
});