diff --git a/README.md b/README.md
index 5c8929d..b267c43 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,16 @@ We also ported LPAds to JavaScript! To include in your site, add in your html fi
 <script src="https://raw.githubusercontent.com/Crawlerop/lpads/main/lpadsjs/mapads.js" crossorigin=""></script>
 ```
 If you want the examples, please click [here](https://crawlerop.github.io/lpads/lpadsjs/mapads_marker.html?localads=true)  
-We also have included the editor, please click the pencil button to start editing the ads.
+We also have included the editor, please click the pencil button to start editing the ads. For advanced features, append &init=base64(script) and &event=base64(script). Where init script parameter is run on startup, and event script parameter is run on ad parsing. The typical script looks something like:
+
+function (ad) {
+    if (ad.adName.search("eggs") != -1) {
+        ad.adName = "spam"
+    }
+    return ad
+}
+
+It only override the ad if the resulting event function is NOT null.
 
 ## Tracking
 Locational ads depends on your interests. So ads may very on different account you are using.