At the top of your browser (usually on the second line) you will see "Tools". Click on Tools and your browser should look like this:

Now left click on the bottom entry, "Internet Options", which should bring up a grey box.
Across the top of the box are a row of tabs. Click on the one labeled "Privacy". This will open a box. In the middle of the box, on the left, is a button labelled "Sites". Click "Sites".
You will now see a blank white box. Type "dhreport.com" into this box and then click the button labelled "Allow". Click "OK", then click the next "OK", and you're all set.
The procedure in Firefox is almost exactly the same as in Internet Explorer. Click Tools, then "Options . . .", then click the "Privacy" tab. In Firefox, the button is labelled "Exceptions" instead of "Sites".