JAVA servlet sometimes not being run

When submit button on HTML form is pressed, JavaScript is run to call a
JAVA Servlet.

If processing in Servlet is successful I go to an external payment company
site.

But have had instances where JavaScript is not run and user goes directly
to payment site without Servlet being run.

Application processes about 1000 users in a week, and maybe just 1 or 2 of
those will be as above.

I have never been able to recreate problem in my testing.

I am running app on a Websphere server running on an iSeries.

Please help!


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