$.extend($.ui.accordion.animations, {
	slowslide: function(options) {
		$.ui.accordion.animations.slide(options, { duration: 600 }); }
});

$(document).ready(function(){
	$("#accordion").accordion({
		autoHeight: false,
		active: false,
		header: 'dt',
		collapsible: true,
		animated: 'slowslide',
		navigation: true
	});
});