How to prevent re-loading the jsp before servlet execution gets over

Question

Hi,
From jsp, I am calling a function in js. From javascript function, I am calling a servlet in background frame after doing client-side validation. Before the servlet execution gets over, javascript function is getting over and it starts reloading the jsp again.
I want to restrict the re-loading of jsp till the background servlet execution gets over.
In background servlet, I am doing query execution.
Its urgent. Please help me with this question.
Thanks in advance,
Sri

Answer 1

For the time being, one suggestion would be to time how long the sql statement takes to execute. Lets say 1.5 seconds.
Go into your javascript function and add say a 1.5 + .5 = 2.0 second delay before the javascript function completes (submits the page).
This is a temporary fix. I doubt there is a better fix to this without knowing a great deal of AJAX and how it handles asynchronous communications.
I don't know what the javascript function for creating a 2.0 second delay, but I imagine there is one in a javascript book.
Once you implement the temporary fix above, I suggest you redesign your project to avoid these asynchronous problems by treating
all your JSP pages as simple display pages and not embed any business logic in them (or in the javascripts). All processing should be done back on the server via servlets.