diff -r 000000000000 -r 4b52e95a0104 update/update.js.in
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/update/update.js.in	Thu Jul 07 19:03:54 2016 +0100
@@ -0,0 +1,68 @@
+var WshShell = WScript.CreateObject("WScript.Shell");
+var ScriptPath = WScript.ScriptFullName.replace(/\\[^\\]*$/, "");
+var FileSystemObject = new ActiveXObject("Scripting.FileSystemObject");
+
+function RunUpdate(args)
+{
+    var OKButton = 0, ErrorIcon = 16, ForReading = 1;
+    var path, command, i, ExecObject, text;
+    path = FileSystemObject.BuildPath(ScriptPath, "update.exe");
+    command = "\"" + path + "\"";
+    for(i = 0; i < args.Length; i++)
+	command += " \"" + args.Item(i) + "\"";
+    ExecObject = WshShell.Exec(command);
+    if (!ExecObject.StdErr.AtEndOfStream)
+    {
+	text = "Update failed for an unexpected reason. Please report "
+	  + "the following error to support@city-occupational.co.uk:\n\n"
+	  + ExecObject.StdErr.ReadAll();
+	WshShell.Popup(text, 0, "Update failed", OKButton + ErrorIcon);
+	return false;
+    }
+    else if (ExecObject.ExitCode)
+    {
+	text = "Update failed without giving a reason. Please report "
+	  + "this to support@city-occupational.co.uk";
+	WshShell.Popup(text, 0, "Update failed", OKButton + ErrorIcon);
+	return false;
+    }
+    return true;
+}
+
+function Update()
+{
+    var path;
+    path = FileSystemObject.BuildPath(ScriptPath, "pre-inst.exe");
+    WshShell.Run("\"" + path + "\"" + " --post \"wscript.exe"
+      + " \\\"" + WScript.ScriptFullName + "\\\""
+      + " --post %INSTALL_PREFIX% %TEST_RESULT%\"",
+      7, true);
+}
+
+function PostUpdate()
+{
+    var OKButton = 0, InfoIcon = 64, text;
+    var test_result, install_prefix, path, args;
+    install_prefix = WScript.Arguments.Item(1);
+    test_result = WScript.Arguments.Item(2);
+    if (test_result == "pass")
+    {
+	path = FileSystemObject.BuildPath(install_prefix,
+	  "bin\\app-manager.exe");
+	WshShell.Run("\"" + path + "\" --update \"" + ScriptPath + "\"");
+    }
+    else
+    {
+	args = { Length:0, Item:function(){return nil} };
+	if (RunUpdate(args))
+	{
+	    text = "Software update completed successfully.";
+	    WshShell.Popup(text, 0, "Software Update", OKButton + InfoIcon);
+	}
+    }
+}
+
+if (WScript.Arguments.Length < 1)
+    Update()
+else if (WScript.Arguments.Length >= 3 && WScript.Arguments.Item(0) == "--post")
+    PostUpdate()