Perform backup and restoration of form values.

Localstorage Form Backup

jQuery.support.localstorage = function() {
  var mod = 'modernizr';
  try {
    localStorage.setItem(mod, mod);
    localStorage.removeItem(mod);
    return true;
  } catch(e) {
    return false;
  }
}

jQuery(document).ready(function($) {
  if ($.support.localstorage()) {
    reload_state();
    var currentState = [];
    $('form').change(function(){
      currentState = [];
      $("form *").filter(':input:not(:file)').each(function(){
        //console.log($(this));
        var temp = {
          'id': $(this).attr('id'),
          'value': $(this).val()
        }
        currentState.push(temp);
      });
      localStorage['currentState'] = JSON.stringify(currentState);
    });
  }
  function reload_state() {
    if (localStorage.getItem("currentState") !== null) {
      var currentState = JSON.parse(localStorage["currentState"]);
      $.each(currentState, function(i, v){
        if (typeof v.id !== 'undefined' && v.value !== '') {
          $('#' + v.id).val(v.value);
        }
      });
    }
  }
  function clear_state() {
    if (localStorage.getItem("currentState") !== null) {
      localStorage.removeItem('currentState');
    }
  }
});