file.js

$.sammy(function() {
  
  var h = "";
  this.bind('run', function() {
    $(window).bind('scroll', function() {
      // find nearest `h` and set it to $h
      h = $h.attr('id');
      // redirect to the new location
      this.redirect('#', 'area', h);
    });
  });
  
  this.get('#/area/:h', function(ctx) {
    // check h
    if (h != this.params.h) {
      // focus on $h
    } else {
      // do nothing
    }
  });

})