If that doesn't work, and if you're using Internet Explorer, there's an option in the "Internet Options" on the "Advanced" tab, underneath Multimedia, where you can un-check "Show Pictures". What this results in is IE will not download any recognized graphic types (mainly .GIF, .JPG, or .PNG) when you load the page, which may help. I used this option often when I was out to sea.
Unfortunately in some cases, it means that ANY button or menu or feature that is in a graphical format will not display. But if you know where those are, you can right-click on the red X and "Show Picture".