Chat Users shown as offline after a while

hint.
the ray chat is a plugin. it is not 100% fully integrated with Dolphin.
options are:
# 1
set the online status in the advanced setting to an hour or more for all members.
# 2
make the chat open in a new window, and hope your members do not close the main dolphin window. but they still need to browse the main dolphin site if you have the online setting set to 5 minutes. or they will show offline anyway once the time is up.

hmm, thanks for first comment but I´m looking for a bit more comfortable solution.
I embedded an iframe with 1px width and 1px height which opens the file "online.php" in this file has all content of "index.php" plus meta tag refresh of itself all 4 minutes and the online status is shown for 5 minutes.
Well, it´s not the best solution but till someone posts a better solution I will use this one.