(function( $ ){
	$.fn.vsSlideDown = function(callback, animationSpeed) {
		if (!animationSpeed) {
			animationSpeed = aniSpeed;
		}
		return this.each(function() {
			$(this).effect('slidev', {direction: 'up', mode: 'show'}, animationSpeed, callback);
		});
	};
	
	$.fn.vsSlideUp = function(callback, animationSpeed) {
		if (!animationSpeed) {
			animationSpeed = aniSpeed;
		}
		return this.each(function() {
			$(this).effect('slidev', {direction: 'up', mode: 'hide'}, animationSpeed, callback);
		});
	};
})( jQuery );