Internet Explorer 8 Video :
How To Allow Specific Site Pop-ups

Step #1: Click on Tools in the top menu bar.
Step #2: Click Pop-up Blocker.
Step #3: Click Pop-up Blocker Settings.
Step #4: Type the website address to add.
Step #5: Click Add.
Step #6: Click Close.

Result: A specific website was added to the allowed sites of pop-up blocker.

Instead of turning pop-up blocker off when you are viewing particular websites then turning it back on after, this action can allow you to automatically turn off pop-up blocking for sites that you allow.