To open the chat window from another location, all you need to do is add the CSS class "agent-launcher" to the desired element.
For example:
From a hyperlink:
<a href="javascript:void(0)" class="agent-launcher">Open online support</a>
From an image:
<img src="image/banner.gif" class="agent-launcher"/>
Once the chat window is open, it can be dragged to any location the user desires by using drag and drop on the floating window's header.