These are site's system requirements:

• 32-bit or 64-bit operating system Windows XP/Vista/7 or Linux (e.g., Ubuntu);
• high-capacity video card to render 3D graphics (e.g. gaming video card) with actual drivers installed;
• a recent version of one of the following browsers: Mozilla Firefox, Google Chrome, Opera, Internet Explorer;
• enabled JavaScript support in your browser;
• Sun JRE7 with browser plug-in to embed an applet.

Also a screen resolution no less than 1024x768 is recommended.