Check if the browser can handle touch events

isTouch

function isTouch() {
     var el = document.createElement('div');
     var isTouch = !!('ontouchstart' in window);
     if(!isTouch) {
               isTouch = !!('ontouchstart' in el);
     }
     if(!isTouch) {
    el.setAttribute('ontouchstart', 'return;');
    isTouch = typeof el['ontouchstart'] == 'function';
     }
     el = null;
  return isTouch;
}