title: Include JS File in another JS file
body: <p>I need some help.
  So, i have a js file which contains themes for maps.
  I want to include it to my another js file,and call all themes to make a option for selecting map theme.</p>
  
  <p>Here is my code for map themes:</p>
  
  <pre><code>     green_theme: [{
                  "featureType": "water",
                  "elementType": "geometry",
                  "stylers": [{
                      "visibility": "on"
                  }, {
                      "color": "#aee2e0"
              }]
          }, {
              "featureType": "landscape",
              "elementType": "geometry.fill",
              "stylers": [{
                  "color": "#abce83"
              }]
          }, {
              "featureType": "poi",
              "elementType": "geometry.fill",
              "stylers": [{
                  "color": "#769E72"
              }]
          }, {
              "featureType": "poi",
              "elementType": "labels.text.fill",
              "stylers": [{
                  "color": "#7B8758"
              }]
          }, {
              "featureType": "poi",
              "elementType": "labels.text.stroke",
              "stylers": [{
                  "color": "#EBF4A4"
              }]
          }, {
              "featureType": "poi.park",
              "elementType": "geometry",
              "stylers": [{
                  "visibility": "simplified"
              }, {
                  "color": "#8dab68"
              }]
          }, {
              "featureType": "road",
              "elementType": "geometry.fill",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "road",
              "elementType": "labels.text.fill",
              "stylers": [{
                  "color": "#5B5B3F"
              }]
          }, {
              "featureType": "road",
              "elementType": "labels.text.stroke",
              "stylers": [{
                  "color": "#ABCE83"
              }]
          }, {
              "featureType": "road",
              "elementType": "labels.icon",
              "stylers": [{
                  "visibility": "off"
              }]
          }, {
              "featureType": "road.local",
              "elementType": "geometry",
              "stylers": [{
                  "color": "#A4C67D"
              }]
          }, {
              "featureType": "road.arterial",
              "elementType": "geometry",
              "stylers": [{
                  "color": "#9BBF72"
              }]
          }, {
              "featureType": "road.highway",
              "elementType": "geometry",
              "stylers": [{
                  "color": "#EBF4A4"
              }]
          }, {
              "featureType": "transit",
              "stylers": [{
                  "visibility": "off"
              }]
          }, {
              "featureType": "administrative",
              "elementType": "geometry.stroke",
              "stylers": [{
                  "visibility": "on"
              }, {
                  "color": "#87ae79"
              }]
          }, {
              "featureType": "administrative",
              "elementType": "geometry.fill",
              "stylers": [{
                  "color": "#7f2200"
              }, {
                  "visibility": "off"
              }]
          }, {
              "featureType": "administrative",
              "elementType": "labels.text.stroke",
              "stylers": [{
                  "color": "#ffffff"
              }, {
                  "visibility": "on"
              }, {
                  "weight": 4.1
              }]
          }, {
              "featureType": "administrative",
              "elementType": "labels.text.fill",
              "stylers": [{
                  "color": "#495421"
              }]
          }, {
              "featureType": "administrative.neighborhood",
              "elementType": "labels",
              "stylers": [{
                  "visibility": "off"
              }]
          }],
  
          black_theme: [{
              "stylers": [{
                  "hue": "#ff1a00"
              }, {
                  "invert_lightness": true
              }, {
                  "saturation": -100
              }, {
                  "lightness": 33
              }, {
                  "gamma": 0.5
              }]
          }, {
              "featureType": "water",
              "elementType": "geometry",
              "stylers": [{
                  "color": "#2D333C"
              }]
          }],
  
          blue_theme: [{
              "featureType": "landscape.natural",
              "elementType": "geometry.fill",
              "stylers": [{
                  "visibility": "on"
              }, {
                  "color": "#e0efef"
              }]
          }, {
              "featureType": "poi",
              "elementType": "geometry.fill",
              "stylers": [{
                  "visibility": "on"
              }, {
                  "hue": "#1900ff"
              }, {
                  "color": "#c0e8e8"
              }]
          }, {
              "featureType": "road",
              "elementType": "geometry",
              "stylers": [{
                  "lightness": 100
              }, {
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "road",
              "elementType": "labels",
              "stylers": [{
                  "visibility": "off"
              }]
          }, {
              "featureType": "transit.line",
              "elementType": "geometry",
              "stylers": [{
                  "visibility": "on"
              }, {
                  "lightness": 700
              }]
          }, {
              "featureType": "water",
              "elementType": "all",
              "stylers": [{
                  "color": "#7dcdcd"
              }]
          }],
  
          retro_theme: [{
              "featureType": "administrative",
              "stylers": [{
                  "visibility": "off"
              }]
          }, {
              "featureType": "poi",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "road",
              "elementType": "labels",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "water",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "transit",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "landscape",
              "stylers": [{
                  "visibility": "simplified"
              }]
          }, {
              "featureType": "road.highway",
              "stylers": [{
                  "visibility": "off"
              }]
          }, {
              "featureType": "road.local",
              "stylers": [{
                  "visibility": "on"
              }]
          }, {
              "featureType": "road.highway",
              "elementType": "geometry",
              "stylers": [{
                  "visibility": "on"
              }]
          }, {
              "featureType": "water",
              "stylers": [{
                  "color": "#84afa3"
              }, {
                  "lightness": 52
              }]
          }, {
              "stylers": [{
                  "saturation": -17
              }, {
                  "gamma": 0.36
              }]
          }, {
              "featureType": "transit.line",
              "elementType": "geometry",
              "stylers": [{
                  "color": "#3f518c"
              }]
          }]
  </code></pre>
  
  <p>And here is my code for another js file:</p>
  
  <pre><code>var options = {
                  zoom: 6,
                  mapTypeId: google.maps.MapTypeId.ROADMAP,
                  //mapTypeId: google.maps.MapTypeId.HYBRID ,
                  mapTypeControl: true,
                  streetViewControl: true,
              center: new google.maps.LatLng(14.435947810360242, 121.01270109415054),
              zoomControl: true,
              zoomControlOptions: {
                  style: google.maps.ZoomControlStyle.SMALL,
                  position: google.maps.ControlPosition.RIGHT_BOTTOM
              }
          };
  
          //refresh map
          var map = new google.maps.Map(document.getElementById('map'), options);
  </code></pre>
  
  <p>Thanks in Advance!</p>