tsmd

$.fn.haneru = function (x, y, takasa, duration) {
	var self = this;
	return  self.queue(function () {
		var offset = self.offset();
		var step = function (now, fx) {
			if (fx.prop !== 'y') return;
			self.css({
				left:fx.elem.x,
				top:fx.elem.y - Math.sin(Math.PI * fx.pos) * takasa
			});