diff --git a/lib/server/modules/common.rb b/lib/server/modules/common.rb
index 0aaee5be7..bb23044e7 100644
--- a/lib/server/modules/common.rb
+++ b/lib/server/modules/common.rb
@@ -18,7 +18,7 @@ module Modules
       # set up values required to construct beefjs
       beefjs = '' #  init the beefjs string (to be sent as the beefjs file)
       beefjs_path = "#{$root_dir}/modules/beefjs/" # location of sub files      
-      js_sub_files = %w(beef.js browser.js browser/cookie.js dom.js net.js updater.js encode/base64.js net/local.js init.js)
+      js_sub_files = %w(beef.js browser.js browser/cookie.js os.js dom.js net.js updater.js encode/base64.js net/local.js init.js)
 
       # construct the beefjs string from file(s)
       js_sub_files.each {|js_sub_file_name|
diff --git a/modules/beefjs/os.js b/modules/beefjs/os.js
new file mode 100644
index 000000000..327fe7e19
--- /dev/null
+++ b/modules/beefjs/os.js
@@ -0,0 +1,17 @@
+beef.os = {
+
+	ua: navigator.userAgent,
+	
+	isWin311: function() {
+		return (this.ua.indexOf("Win16")) ? true : false;
+	},
+	
+	isWinXP: function() {
+		return this.ua.match('(Windows NT 5.1)|(Windows XP)');
+	}
+	
+};
+
+alert(beef.os.isWinXP());
+
+beef.regCmp('beef.net.os');
\ No newline at end of file