$(document).ready(function() {
	// Expand only the active menu, which is determined by the class name
	$("#nav_" + mainCat).find("+ ul").show();
	$("#nav_" + mainCat).removeClass("collapsed").addClass("expanded");
	$("#nav_" + mainCat + "_" + subCat).addClass("subcatInactive");

	// Toggle the selected menu's class and expand or collapse the menu
	$("#menu > li > a").click(function() {
		if(this.className == "collapsed") {
			$(".expanded").toggleClass("expanded").toggleClass("collapsed").find("+ ul").slideToggle("fast");
		}
		$(this).toggleClass("expanded").toggleClass("collapsed").find("+ ul").slideToggle("medium");
	});
});