Issue with firePartialAction or how to include JavaScript Functions

Question

We are using the Client Action Type: firePartialAction on an element in a region of type: TABLE. When a user enters data in here and tabs away, the action fires and recalculates 2 other fields in the same region. On a object with a small number of rows, it seems to work fine. However, when you have a large number of rows (anything over 25), the page seems to hang for nearly a minute and then when it does come back, the values are sometimes not calculated properly.
The only reason we are using firePartialAction is because the dev guide says that JavaScript is not supported by OAF. We would much rather use a client-side JavaScript function to do these simple arithemtic operations rather than do them on the server.
My question is two-fold:
1 - Has anyone experienced this issue and are there any other settings or coding tricks that we should be aware of.
2 - Has anyone ever rendered a page with a custom JavaScript tag (or library)? Also, where would you add the code in JDeveloper to get a particular element to execute a particulate javascript function (ie: onchange=MCalc())?

Answer 1

The firePartialAction event is not working for us, so we need to be able to at least try out javascript. We're rendering the page from an XML file, so it's not clear to us how we would even get a custom HTML tag to render into the page at all. Normally, I'd use some kind of HttpServletResponse.getWriter()...println method call to write html (as in a controller servlet), but how would you do that using the OAWebBean? I checked the OAFromattedTextBean, would that allow me to embed onchange into the field?