Failing to Point to an External JS File

[Dr__JasrajGramopadhye]

Hi All,

I am trying to point to an external JavaScript file from my main JS code.
The external file contains code to run Navigation Toolbar.

To load it into my main code, I have defined a function called loadjs().
Although I do not get any errors as far as pointing to the file is concerned, the external file does not seem to load.
My Navigation toolbar buttons continue to be non-functional.

I am attaching the code for reference. loadjs() is placed at the bottom after map.addlayers.
Any suggestions are appreciated!

Thanks.
Jasraj

<script>   var djConfig = {

            parseOnLoad: true,
            packages:
   [{
                "name": "agsjs",
                "location": "http://gmaps-utility-gis.googlecode.com/svn/tags/agsjs/latest/build/agsjs/"
            }]

        };


</script>

    <script src="http://js.arcgis.com/3.9/"> </script>

<script>
      var map;
   var navToolbar;

      require([
        "esri/map",
        "esri/layers/ArcGISDynamicMapServiceLayer",
        "esri/layers/ImageServiceParameters",
 
  "dojo/_base/connect",
     "dojo/dom", "dojo/parser","dojo/on", "dojo/_base/Color",
  "esri/geometry/Extent",
  "esri/layers/FeatureLayer",
  "esri/layers/ArcGISTiledMapServiceLayer",
  "esri/symbols/SimpleFillSymbol",
  "esri/renderers/ClassBreaksRenderer",
  "agsjs/dijit/TOC",
  "dijit/layout/BorderContainer",
  "dijit/layout/ContentPane",
   
  "esri/toolbars/navigation",
  "dijit/registry",
        "dijit/Toolbar",
        "dijit/form/Button",
  "dojo/fx",
  "dojo/domReady!"
  //"dojo/domReady!"
 
  ],
   
  function(Map, ArcGISDynamicMapServiceLayer, ImageParameters, connect, dom, parser, on, Color,
   Extent, FeatureLayer, ArcGISTiledMapServiceLayer,
  SimpleFillSymbol,ClassBreaksRenderer, TOC, BorderContainer, ContentPane, Navigation, registry, Toolbar, Button)
     
  
        {
   parser.parse();
  //var navToolbar;
 
        map = new Map("mapDiv", {
          sliderOrientation : "horizontal"
        });
 
  var imageParameters = new ImageParameters();
        imageParameters.format = "PNG"; //set the image type to PNG24, note default is PNG8.

        //Takes a URL to a non cached map service.
        var dynamicMapServiceLayer = new ArcGISDynamicMapServiceLayer("http://vm-gisdev.personcounty.local/arcgis/rest/services/TaxWebApp/Tax_Web_Application/MapServer", {
          "opacity" : 1,
          "imageParameters" : imageParameters
        });

        map.addLayer(dynamicMapServiceLayer);
 
   featLayer1 = new FeatureLayer("http://vm-gisdev.personcounty.local/arcgis/rest/services/TaxWebApp/Tax_Web_Application/MapServer/1", {
                mode: FeatureLayer.MODE_SNAPSHOT,
                outFields: ["*"]
              });
    
     /* dynaLayer1 = new FeatureLayer("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/0", {
                mode: FeatureLayer.MODE_SNAPSHOT,
                outFields: ["*"]
              });*/
     
  
        map.on ('layers-add-result', function (evt) {
                // overwrite the default visibility of service.
                // TOC will honor the overwritten value.
                //dynamicMapServiceLayer.setVisibleLayers ([2, 5, 8, 11]);
                //try {
                  toc = new TOC({
                    map: map,
                    layerInfos: [{
                      layer: featLayer1,
                      title: ""
                    }, {
      layer: dynamicMapServiceLayer,
                     title: ""
       }
     ]
                  }, 'tocDiv');
                  toc.startup()
      });   
  
  map.addLayers([featLayer1]);
 
 
    // Function to Call an External JS file - NavToolbar.js

    function loadjs(){
     var script=document.createElement('script');
  script.type='text/javascript';
  script.src='C:/inetpub/wwwroot/TaxWebApp/Code/NavToolbar.js';
  varhead=document.getElementByTagName("head")[0];
  head.appendChild(script);
  }
     </script>