if ("ontouchstart" in window || navigator.msMaxTouchPoints) { touch = true; downEventName = "touchstart"; upEventName = "touchend"; moveEventName = "touchmove"; }

$handle.on(downEventName, onHandleDown); $handle.on(upEventName, onHandleUp);

function onHandleDown(ev) { $w.on(moveEventName, onHandleMove); $w.on(upEventName, onHandleUp); }

function onHandleUp(ev) { $w.off(moveEventName, onHandleMove); }

function onHandleMove(ev) { var offset = $track.offset(); var mouseX = Math.round(ev.pageX - offset.left); var width = $track.width();

if (touch) { mouseX = Math.round(ev.originalEvent.pageX - offset.left); ev.preventDefault(); ev.stopPropagation(); }

if (mouseX > width){ mouseX = width; }

if (mouseX