How can I open multiple new windows without triggering a pop-up Blocker?

Hi -

I have a form where a user puts in some inputs. Upon filling out the form, the user clicks a button. Upon clicking, two new URLs should open in new tabs. The problem is that the browser is blocking the second URL. I'm using custom code to accomplish this. Setting a variable (ex: RedirectURL) and then using Windows.Open( RedirectURL) to open the window. Can anyone help me please