Here's how to proceed as per your Blackberry Curve 8520 user guide:
1. In the browser, press the Menu key.
2. Click Options.
3. Click Browser Configuration.
4. Select any of the following check boxes:
5. Press the Menu key.
6. Click Save Options.
There is also a browser shortcut. Depending on the typing input language that you are using, the shortcut might not be available.
On a web page
If it does not work, I would have to refer you to Blackberry for further assistance.
Does anyone have another answer to this question?
Let us know how it goes!