Add a 'chat now with operator' image to your site without having to run the server/database necessary to operator live chat services. Just copy/paste HTML coding to each page that you want to display the image on.
A web-based operator console is used to manage multiple live chats. The console can see all visitors to your site live, and chat 'invites' can be sent to those visitors as well. Get a free trial of this hosted live chat service at: http://www.gotlivechat.com/