I don't think I've ever seen a white box with a blue bar in the center - is it all images or just some? Normally you'd see a black box with a red X in the center.
If its all images, follow the link below -
Why can't I see the pictures on a website There a many ways to block advertisements, one of the easiest is to install tracking protection. Follow the link at the bottom of the 1st page and install the "Easy List" at the top of the 2nd page. If it causes issues it can be disabled under Manage Add-ons.
Tracking Protection Edit - I'm assuming you're using IE - If not, an ad-blocker generally does just as good a job.