Here's something to explore. Note that the load() documentation says:
"Note: The event handling suite also has a method named
.load()
.
jQuery determines which method to fire based on the set of arguments
passed to it."
So jQuery Core may think your line 15 is an event call. If you
haven't already, you could explore this several ways - 1. add a
data object to the load argument, 2. in Chrome Developer or Firebug,
check the message sent and the server response received, 3. make the
load argument look like a file name, something like insertInstanz.jsp
Hope
this helps. Its a hunch.