Your browser has not been checked for parasites, because
JavaScript is disabled.
For technical reasons, the automatic-detection feature on this
web page can only work with Internet Explorer on Windows, when
"Active scripting" is enabled and "Download signed ActiveX
components" is not disabled.
If you are an IE/Win user, you can turn JavaScript on (temporarily
is probably best) by going to Tools->Internet Options->Security->Internet
Zone->Custom Settings and setting ’Active Scripting’ to ’Enable’ or
’Prompt’. Then reload the page.