JSGrid Dependent Filters

HTML

<link rel="stylesheet" href="http://js-grid.com/css/jsgrid.min.css">
<link rel="stylesheet" href="http://js-grid.com/css/jsgrid-theme.min.css">
<script src="http://js-grid.com/js/jsgrid.min.js"></script>
<script src="http://underscorejs.org/underscore-min.js"></script>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.10.4/themes/redmond/jquery-ui.css">
<script src="https://code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
<div id="jsGrid"></div>

JavaScript

department_list = [{
    "id": 1,
    "department": "Department A"
  },
  {
    "id": 2,
    "department": "Department B"
  }
];

team_list = [{
    "department": "Department A",
    "id": 1,
    "team": "Team A"
  },
  {
    "department": "Department B",
    "id": 2,
    "team": "Team B"
  },
  {
    "department": "Department B",
    "id": 3,
    "team": "Team C"
  }
];

/*select_list = [
    {Name:"", id:"1"},
    {Name:"select1 value1",id:"2", type:"TypeA"},
    {Name:"select1 value2",id:"2",type:"TypeA"},
    {Name:"select2 value1",id:"3",type:"TypeB"},
    {Name:"select2 value1",id:"3",type:"TypeB"}
];*/

content = [{
  "id": 1,
  "activity_type": "CORE",
  "department": "Department B",
  "team": "Team B",
  "time": "864000"
}];
var TimeField = function(config) {
  jsGrid.Field.call(this, config);
};

TimeField.prototype = new jsGrid.Field({

  css: "date-field",
  align: "right",


  itemTemplate: function(value) {
    return Math.round(value / 86400) + " d " + Math.round((value % 86400) / 3600) + " h ";
  },
  insertTemplate: function(value) {
    console.log("insert");
    return this._insertTime = this._createTimeBox();
  },
  filterTemplate: function(value) {
    return this._filterTime = this._createTimeBox();
  },
  editTemplate: function(value) {
    console.log("edit");
    return this._editTime = this._createTimeBox();
  },
  insertValue: function() {

    var days = this._insertTime.siblings("input")[0].value;
    var hours = this._insertTime.siblings("input")[1].value;
    return days * 86400 + hours * 3600;

  },
  eidtValue: function() {

    var days = this._editTime.siblings("input")[0].value;
    var hours = this._editTime.siblings("input")[1].value;
    return days * 86400 + hours * 3600;

  },
  filterValue: function() {

    var days = this._filterTime.siblings("input")[0].value;
    var hours = this._filterTime.siblings("input")[1].value;
    return days * 86400 + hours * 3600;

  },
  _createTimeBox: function() {
    return...