Chat window popup in same window

Hello ,

I am using this to get the chat window to popup.

<a href="javascript:void(zE('webWidget', 'popout'))">Chat</a>

this works great to popout into a new window. But I need to have it open in the same window. 
I have tried some of the other syntax provided but am having no luck.
Any ideas on the correct syntax for an anchor to open in same window? 

Thank you