var show_hide_address = function(ev) {
	el = ev.element();
	if (!el.checked)
		return;
	if (el.value == "no")
		$("your-own-address").show();
	else
		$("your-own-address").hide();
};

Event.observe(window, "load", function() {
		if (!$("your-own-address")) return;
		$("your-own-address").hide();
		$$("input.live-at-property").each(function(el) {
			el.observe("click", show_hide_address);
			show_hide_address({element: function() { return el }});
		});
});