diff --git a/source/Ox/js/RegExp.js b/source/Ox/js/RegExp.js
index 3d0d2e1d..2da70a6d 100644
--- a/source/Ox/js/RegExp.js
+++ b/source/Ox/js/RegExp.js
@@ -1 +1,9 @@
-// Opera doesn't like empty js files
\ No newline at end of file
+/*@
+Ox.escapeRegExp <f> Escapes a string for use in a regular expression
+    (str) -> <r> Escaped string
+    str <s> String
+@*/
+// see https://developer.mozilla.org/en/JavaScript/Guide/Regular_Expressions
+Ox.escapeRegExp = function(str) {
+    return (str + '').replace(/([\/\\^$*+?.-|(){}[\]])/g, '\\$1');
+};
\ No newline at end of file