The Duration of Hold application has been tested and verified with the following browsers:

Windows XP

Windows Vista 

Windows 7

Internet Explorer 8

Firefox 3.6

Google Chrome 

Safari

 A Java Runtime Environment needs to be installed. One can be obtained from here.

On a Mac please use the following browsers:

Safari v5.0.1 (Recommended)

Firefox 3.6 (Doesn't work with some configurations)