function(touch, p) {
		p.x = touch.pageX;
		p.y = touch.pageY;
		p.id = touch.identifier;
		return p;
	}
function(touch, p) {
		p.x = touch.pageX;
		p.y = touch.pageY;
		p.id = touch.identifier;
		return p;
	}
function ( touch , p ) { p . x = touch . pageX ; p . y = touch . pageY ; p . id = touch . identifier ; return p ; }
amount of pixels to drag to determine direction of swipe
amount of pixels to drag to determine direction of swipe
touch event handler