Prevent opening a page in multiple tabs

Question

Hi,
is it possible to prevent users from opening the same page in two or more tabs in the browser? And how?
Thank you!

Answer 1

I'll try to explain why, on an imaginary example with employees and departments, to avoid lengthy explanation of our application.
Lets say I have a list of departments on page 100. Clicking on one of the departments on page 100 sets the value of item P200_DEPARTMENT_ID and takes us to page 200 where we can see the list of employees and their salaries in that particular department (...where department_id=:P200_DEPARTMENT_ID).
On page 200 we can increase the salary of each employee by clicking on a button placed next to employees' names. The button executes a procedure, and I don't want to submit the entire page to do so. Instead, I execute the procedure in a Dynamic action, and after that I refresh the region displaying employees and their salaries, to show the increased salary.
That works fine, except when I open that same page in two tabs.
First, on page 100, I click on department A, and open that in new tab. This sets the item P200_DEPARTMENT_ID to ID of department A, and shows me the employees in department A.
Then I click on department B, opening that in a new tab as well. This sets the item P200_DEPARTMENT_ID to ID of department B, and shows me the list of employees in department B.
After that, I go back to first tab (the one for department A) and after increasing the salary for an employee in first tab, refreshing the list of employees will show me the data for department B, because the item P200_DEPARTMENT_ID, which I use in my region source, is set to the ID of department B.
I hope I managed to explain the problem with opening the page in two different tabs, I apologize for my English and, as always, thank you.