How to bind to web sockets server from old browser that does not suppot HTML5

I am building a WEB application which waits a message from my admin web application server.

I solved this by using html5 websocket programming ;

But not all my clients do have html5 support in thier browsers. So I am searching for a way to bind to the websocket server from an old browser even in a low level programming (lower than websocket) in javascript .

Is this possible to be done ?

Answers suports the most browsers, but unfortunately not all.

For old browsers without WebSocket, but Flash, there is this fallback WebSocket implementation in Flash.

For old IE, there is Google Chrome Frame.

Both should work with Ratchet (since they make the old browser actually speak WebSocket).

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