Javascript Sum Function

Javascript function to calculate value of two textboxes, and return the total to a 3rd textbox. ## Deliverables Using SQL 2008 VS 2008 VB I have a one page sample project attached, that performs javascript calculations. The current app pretty much explains itself. What I need to accomplish here is to be able to perform calculations inside a databound FormView, in the Edit Template and Insert Template. The current app does not use a databound FormView, so you will need to create an additional page, include a FormView, three textboxes to show the operation. Will also need instructions on how to use the function in other projects. It would be great if you did NOT use add-ins, (dll's etc) As shown in the example, I need TextBoxX onChange event to calculate TextboxX + TextBoxX and populate TextboxX. Will be glad to answer any questions to clarify.