Function to disable scrolling on a webpage, with optional override. Most often used with mobile web apps.

disableScroll.js

var isTouchAllowed = function (target) {
      while (target !== document.body) {
            if (target.getAttribute('allow-touch') !== undefined) {
                  return true;
            }
            target = target.parentNode();
      }
      return false;
};

document.body.bind('touchmove', function (e) {
      if(!isTouchAllowed(e.target)) {
            e.preventDefault();
      }
});