$(document).ready(function () {

		$('#accordion li').click(function () {
			//slideup or hide all the Submenu
			$('#accordion li').children('ul').slideUp('fast');	
			//remove all the "Over" class, so that the arrow reset to default
			$('#accordion li > a').each(function () {
				//if ($(this).attr('rel')!='') {
					$(this).removeClass('Over');	
				//}
			});
			//show the selected submenu
			$(this).children('ul').slideDown('fast');
			//add "Over" class, so that the arrow pointing down
			$(this).children('a').addClass('Over');			
		});

	});