> ## Documentation Index > Fetch the complete documentation index at: https://docs.immutable.com/llms.txt > Use this file to discover all available pages before exploring further. # Use your own website > Put the Funnel Page sign-up drawer on your existing marketing site with one script tag Instead of sending traffic to a Play-hosted URL, you can embed the [Funnel Page](/docs/products/attribution/funnel-page) sign-up drawer directly into your own marketing site. A loader script mounts an overlay that opens on demand and carries the whole sign-up flow — email capture and one-time passcode (OTP) verification — without sending the visitor anywhere else. ## Prerequisite: a first-party subdomain You delegate a subdomain to Immutable by CNAME (for example `landing.studio.com`), and Immutable serves the drawer from it. You then add a ` ``` Replace `landing.studio.com` with your own delegated subdomain. * Place the tag right before `` so `` already exists and the drawer can mount immediately. In `` it also works — it waits for `DOMContentLoaded` — but mounts slightly later. * Use a real ` ``` Each queued entry is `[methodName, ...args]`, using the same methods as above. After the loader runs, `window.imtbl.push([...])` keeps working as an alias for calling the method directly. You don't need to queue anything just to load the drawer — the loader mounts its iframe as soon as it runs, so attribution is captured even for a visitor who never opens it. ## Events Register handlers with `imtbl.embed.on(event, callback)`. | Event | Fires when | Payload | | ------------------ | ------------------------------------------------------------------------------------- | ---------------------------------- | | `ready` | The drawer is connected and the API is usable. Fires once per page load; sticky. | none | | `open` | The drawer becomes visible and interactive. | none | | `close` | The drawer becomes hidden and click-through again. | none | | `signup:started` | A visitor has submitted an email inside the drawer. | none | | `signup:completed` | The visitor has verified their OTP. | none | | `error` | The connection to the drawer failed and can't recover for the rest of this page load. | `{ code }` — see [Errors](#errors) | `signup:completed` carries no email, because any third-party script on your page could observe the event. The verified address reaches you through an authenticated export instead. ## Errors | Code | Meaning | Typical cause | | ------------------- | -------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | | `handshake-timeout` | The drawer never answered the initial handshake. | CSP missing your delegated subdomain, or framing from outside your apex. | | `version-mismatch` | The drawer answered with a wire-protocol version this loader doesn't understand. | Rare and transient — a browser holding a cached loader from just before a protocol change. Resolves on the next fetch. | Either error is terminal for the rest of the page load: the drawer never becomes usable, and the loader stops intercepting clicks on `data-imtbl-cta` elements. An `` reverts to a plain link and navigates to its `href`; a `