Some functions on Mobile Browsers, like purchasing Gold with a credit card, may require you to allow pop-ups in order to complete the action. Here's how to allow pop-ups on an iPhone or iPad...
1. Click your settings icon.
2. Click on Safari.
3. Turn off "Block Pop-Ups" so that your phone does not block pop-ups.
You can now go back to your browser and you shouldn't have any problems with functions that require pop-ups.