I would like to use a chat module like this http://www.click4assistance.co.uk/ to my site.

Is there any chat module that has the ability for the livechat window to automatically open to visitors after 30 seconds browsing the website.

Please let me know.

Thanks

I noticed that DNNHero.com uses www.olark.com. You might take a look at that. The price doesn't seem to be unreasonable.