function clicker(e) {
          number = undef;
          var target;
          if (window.event) {
                  target = window.event.srcElement;
                  e = window.event;
          } else target = e.target;
          if (target.getAttribute('href') != null || hasValue(target.rel, 'external') || isParentOrSelf(target, 'controls') || isParentOrSelf(target,'embed') || isParentOrSelf(target,'object')) return true;
          if (!e.which || e.which == 1) {
                  if (!incrementals[snum] || incpos >= incrementals[snum].length) {
                          go(1);
                  } else {
                          subgo(1);
                  }
          }
  }