diff --git a/images/backslash.png b/images/backslash.png
new file mode 100644
index 00000000..cc55c401
Binary files /dev/null and b/images/backslash.png differ
diff --git a/include/rfb.js b/include/rfb.js
index b7be99f8..4e318eed 100644
--- a/include/rfb.js
+++ b/include/rfb.js
@@ -126,7 +126,12 @@ var that           = {},  // Public API methods
     mouse_buttonMask = 0,
     mouse_arr        = [],
     viewportDragging = false,
-    viewportDragPos  = {};
+    viewportDragPos  = {},
+
+    /* Soft key */
+    wrapWithSoftKeyLock,
+    softKeyState = {},
+    softKey = { CtrlLock: 0xFFE3, AltLock: 0xFFE9 };
 
 // Configuration attributes
 Util.conf_defaults(conf, that, defaults, [
@@ -596,12 +601,26 @@ checkEvents = function() {
     setTimeout(checkEvents, conf.check_rate);
 };
 
+wrapWithSoftKeyLock = function(arr) {
+    var k;
+    for (k in softKeyState) {
+        if (softKeyState[k]) {
+            arr = keyEvent(softKey[k], 1).concat(arr);
+            arr = arr.concat(keyEvent(softKey[k], 0));
+        }
+    }
+    return arr;
+}
+
 keyPress = function(keysym, down) {
     var arr;
 
     if (conf.view_only) { return; } // View only, skip keyboard events
 
     arr = keyEvent(keysym, down);
+    if (down) {
+        arr = wrapWithSoftKeyLock(arr);
+    }
     arr = arr.concat(fbUpdateRequests());
     ws.send(arr);
 };
@@ -1829,15 +1848,23 @@ that.sendKey = function(code, down) {
     if (typeof down !== 'undefined') {
         Util.Info("Sending key code (" + (down ? "down" : "up") + "): " + code);
         arr = arr.concat(keyEvent(code, down ? 1 : 0));
+        if (down) {
+            arr = wrapWithSoftKeyLock(arr);
+        }
     } else {
         Util.Info("Sending key code (down + up): " + code);
         arr = arr.concat(keyEvent(code, 1));
+        arr = wrapWithSoftKeyLock(arr);
         arr = arr.concat(keyEvent(code, 0));
     }
     arr = arr.concat(fbUpdateRequests());
     ws.send(arr);
 };
 
+that.updateSoftKeyState = function(name, value) {
+    softKeyState[name] = value;
+};
+
 that.clipboardPasteFrom = function(text) {
     if (rfb_state !== "normal") { return; }
     //Util.Debug(">> clipboardPasteFrom: " + text.substr(0,40) + "...");
diff --git a/include/ui.js b/include/ui.js
index 25bf162b..c287ee9c 100644
--- a/include/ui.js
+++ b/include/ui.js
@@ -143,6 +143,7 @@ addMouseHandlers: function() {
     //$D("keyboardinput").onkeydown = function (event) { onKeyDown(event); };
     $D("keyboardinput").onblur = UI.keyInputBlur;
 
+    $D("sendBackslashButton").onclick = UI.sendBackslash;
     $D("sendCtrlAltDelButton").onclick = UI.sendCtrlAltDel;
     $D("clipboardButton").onclick = UI.toggleClipboardPanel;
     $D("settingsButton").onclick = UI.toggleSettingsPanel;
@@ -391,6 +392,11 @@ setPassword: function() {
     return false;
 },
 
+sendBackslash: function() {
+    UI.rfb.sendKey(0x5C);
+    return false;
+},
+
 sendCtrlAltDel: function() {
     UI.rfb.sendCtrlAltDel();
 },
@@ -489,11 +495,13 @@ updateVisualState: function() {
         UI.setMouseButton(1);
         $D('clipboardButton').style.display = "inline";
         $D('showKeyboard').style.display = "inline";
+        $D('sendBackslashButton').style.display = "inline";
         $D('sendCtrlAltDelButton').style.display = "inline";
     } else {
         UI.setMouseButton();
         $D('clipboardButton').style.display = "none";
         $D('showKeyboard').style.display = "none";
+        $D('sendBackslashButton').style.display = "none";
         $D('sendCtrlAltDelButton').style.display = "none";
     }
     // State change disables viewport dragging.
diff --git a/vnc.html b/vnc.html
index 9d699c9e..dcb6c9fe 100644
--- a/vnc.html
+++ b/vnc.html
@@ -70,6 +70,9 @@
 
         <!--noVNC Buttons-->
         <div class="noVNC-buttons-right">
+            <input type="image" src="images/backslash.png"
+                 id="sendBackslashButton" class="noVNC_status_button"
+                title="Send Backslash" />
             <input type="image" src="images/ctrlaltdel.png"
                  id="sendCtrlAltDelButton" class="noVNC_status_button"
                 title="Send Ctrl-Alt-Del" />
diff --git a/vnc_auto.html b/vnc_auto.html
index a6273256..6f1af127 100644
--- a/vnc_auto.html
+++ b/vnc_auto.html
@@ -25,7 +25,15 @@
             <div id="noVNC_status_bar" class="noVNC_status_bar" style="margin-top: 0px;">
                 <table border=0 width="100%"><tr>
                     <td><div id="noVNC_status">Loading</div></td>
-                    <td width="1%"><div id="noVNC_buttons">
+                    <td width="350pt"><div id="noVNC_buttons">
+                        <input type=checkbox value="CtrlLock"
+                            id="ctrlLockCheckBox">
+                        <label for="ctrlLockCheckBox">CtrlLock</label>
+                        <input type=checkbox value="AltLock"
+                            id="altLockCheckBox">
+                        <label for="altLockCheckBox">AltLock</label>
+                        <input type=button value="Send Backslash"
+                            id="sendBackslashButton">
                         <input type=button value="Send CtrlAltDel"
                             id="sendCtrlAltDelButton">
                             </div></td>
@@ -47,6 +55,16 @@
 
         var rfb;
 
+        var buttons = [
+            {name: 'ctrlLockCheckBox', onclick: updateSoftKeyState},
+            {name: 'altLockCheckBox', onclick: updateSoftKeyState},
+            {name: 'sendBackslashButton', onclick: function() {
+                rfb.sendKey(0x5C);
+                return false;
+            }},
+            {name: 'sendCtrlAltDelButton', onclick: sendCtrlAltDel}
+        ];
+
         function passwordRequired(rfb) {
             var msg;
             msg = '<form onsubmit="return setPassword();"';
@@ -65,11 +83,14 @@
             rfb.sendCtrlAltDel();
             return false;
         }
+        function updateSoftKeyState() {
+            rfb.updateSoftKeyState(this.value, this.checked);
+            return true;
+        }
         function updateState(rfb, state, oldstate, msg) {
-            var s, sb, cad, level;
+            var s, sb, level;
             s = $D('noVNC_status');
             sb = $D('noVNC_status_bar');
-            cad = $D('sendCtrlAltDelButton');
             switch (state) {
                 case 'failed':       level = "error";  break;
                 case 'fatal':        level = "error";  break;
@@ -79,8 +100,15 @@
                 default:             level = "warn";   break;
             }
 
-            if (state === "normal") { cad.disabled = false; }
-            else                    { cad.disabled = true; }
+            var i;
+            for (i = 0; i < buttons.length; i++) {
+                var elem = $D(buttons[i].name);
+                if (state === "normal") {
+                    elem.disabled = false;
+                } else {
+                    elem.disabled = true;
+                }
+            }
 
             if (typeof(msg) !== 'undefined') {
                 sb.setAttribute("class", "noVNC_status_" + level);
@@ -91,8 +119,12 @@
         window.onscriptsload = function () {
             var host, port, password, path, token;
 
-            $D('sendCtrlAltDelButton').style.display = "inline";
-            $D('sendCtrlAltDelButton').onclick = sendCtrlAltDel;
+            var i;
+            for (i = 0; i < buttons.length; i++) {
+                var button = buttons[i];
+                $D(button.name).style.display = "inline";
+                $D(button.name).onclick = button.onclick;
+            }
 
             WebUtil.init_logging(WebUtil.getQueryVar('logging', 'warn'));
             document.title = unescape(WebUtil.getQueryVar('title', 'noVNC'));