diff --git a/build-number.txt b/build-number.txt
index d00491f..b8626c4 100644
--- a/build-number.txt
+++ b/build-number.txt
@@ -1 +1 @@
-1
+4
diff --git a/src/www/index.html b/src/www/index.html
index 458a0ff..42c4837 100644
--- a/src/www/index.html
+++ b/src/www/index.html
@@ -37,6 +37,7 @@
                 <li><a href="#" class=pause-continue>Pause Monitoring</a></li>
                 <li><a href="#" class=refresh>Refresh Now</a></li>
                 <li><a href="#" class=show-config>Config</a></li>
+                <li><a href="#" class=toggle-fullscreen>Go Fullscreen</a></li>
             </ul>
         </section>
         <section id=config-dialog>
diff --git a/src/www/js/personal-display.js b/src/www/js/personal-display.js
index 3476dda..a10c3be 100644
--- a/src/www/js/personal-display.js
+++ b/src/www/js/personal-display.js
@@ -341,7 +341,8 @@
         events: {
             "click a.refresh"           : "refresh",
             "click a.pause-continue"    : "toggleSync",
-            "click a.show-config"       : "showConfig" },
+            "click a.show-config"       : "showConfig",
+            "click a.toggle-fullscreen" : "toggleFullscreen" },
 
         initialize: function() {
 
@@ -373,6 +374,7 @@
             
             // Schedule future refreshes.
             PD.refreshIntervalId = setInterval(this.refresh, PD.refreshPeriod ? PD.refreshPeriod : 15000);
+
         },
 
         refresh: function(evt) {
@@ -504,6 +506,32 @@
 
         showConfig: function() { PD.configDialog.show(); },
 
+        toggleFullscreen: function(evt) {
+            var $button = $(evt.target);
+            if ($button.text() == "Go Fullscreen") {
+
+                if (document.documentElement.requestFullscreen) {
+                    document.documentElement.requestFullscreen(); }
+                else if (document.documentElement.webkitRequestFullscreen) {
+                    document.documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT); }
+                else if (document.documentElement.mozRequestFullScreen) {
+                    document.documentElement.mozRequestFullScreen(); }
+                else { alert ("Not supported by this browser."); }
+                
+                $button.text("Leave Fullscreen"); }
+
+            else {
+
+                if (document.exitFullscreen) {
+                    document.exitFullscreen(); }
+                else if (document.webkitExitFullscreen) {
+                    document.webkitExitFullscreen(); }
+                else if (document.mozCancelFullscreen) {
+                    document.documentElement.mozCancelFullscreen(); }
+                else { alert ("Not supported by this browser."); }
+
+                $button.text("Go Fullscreen"); } },
+
         toggleSync: function(evt) {
             if (PD.refreshIntervalId == null) {
                 PD.refreshIntervalId = setInterval(this.refresh,