Install shoutbox on site.

Need you to find the script or we can use one I just signed up with that has a simple one line script to paste in the files/code where you want it to display. The box is to float on the right side of the screen staying stable on the screen as the user scrolls up and down on the page and the box needs to be minimizable. The chat also needs to be set up so that the users of the site are logged into the chat box automatically when they login to the site and have to choose to log-out of chat. The chat I have now is yourshoutbox.com. My site is [login to view URL] that the chat box is going on. Thanks for lending your help.