Update README.md

nitinjs · web-flow · commit 2ec9e2a60b74 · 2019-04-22T21:08:13.000+05:30
diff --git a/README.md b/README.md
@@ -19,5 +19,6 @@ Sample usage:
     </script>
 ```
 
+[demo](http://nitinsawant.com/jquery-duplicatewindow/TestPage.html)
 
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