function navigation () {
	$("#site_navigation .navigation_submenu a.main_link").remove ();
	$("#site_navigation li:has(ul)").css ("overflow", "hidden");
	$("#site_navigation li .navigation_submenu").hide ();
	$("#site_navigation li").hover (
		function () {
			if ($("#"+$(this).attr("id")+" .navigation_submenu").length) {
				$(this).css ("overflow", "visible");
				$("#"+$(this).attr("id")+" a.main_link").addClass ("hover");
				$("#"+$(this).attr("id")+" .navigation_submenu").slideDown ("fast");
				if ($.browser.msie && $.browser.version.substr(0,1)<7) $("select").css ("visibility", "hidden");
			}
		},
		function () {
			if ($("#"+$(this).attr("id")+" .navigation_submenu").length) {
				$("#"+$(this).attr("id")+" .navigation_submenu").slideUp ("fast");
				$("#"+$(this).attr("id")+" a.main_link").removeClass ("hover");
				if ($.browser.msie && $.browser.version.substr(0,1)<7) $("select").css ("visibility", "visible");
				$(this).css ("overflow", "hidden");
			}
		}
	);
}

window.setTimeout ("navigation()", 100);