ajax

			Constrains dragging to either the horizontal (x) or vertical (y) axis. Possible values: 'x', 'y'.
			Code examples
 
			Initialize a draggable with the axis option specified.
 
			    $('.selector').draggable({ axis: 'x' });
 
			Get or set the axis option, after init.
 
			    //getter
			    var axis = $('.selector').draggable('option', 'axis');
			    //setter
			    $('.selector').draggable('option', 'axis', 'x');