症状

In Internet Explorer 8 there are security warnings displayed when browsing issues : 

There are no warnings displayed when accessing the same content from other browsers.

ソリューション

1. Go to Tools --> Internet Options --> Security Tab on your browser. Here select the proper zone under which your custom pages or the "HTTP" pages came.
2. Now select "Custom Level" button.
3.  Here go to Miscellaneous --> display mixed content and select "Enable" option as shown in the below screen shot.
4. With this done, you will not be prompted anymore.