You can easily embed Brosix into your webpage.
Where _NID_ is your network number, you can find it out in your Web Control Panel.
The embeded widget should look like this way. You can customize the button look by defining a new CSS class.
When a visitor presses the button it will open the chat window:
Go to Web Control Panel - Settings - Integrations tab.
Go to "Web Guests" section and enable "Web Guests" feature.
This will create two groups in your IM network:
Here are more details how to configure the Web Guest feature