if (window.History && window.History.enabled) {
  var vars = {};
  var tables = {};
  vars['something'] = 'value';
  History.replaceState({vars: vars, tables: tables}, null, window.location.href.match(/^([^#]*)/)[1]);
}

var state = History.getState();
var data = state.data;

    if (data.vars) {
          alert('success!');
    }