By Jo Twist
BBC News science and technology reporter
The global web blog community is being called into action to lend support to two imprisoned Iranian bloggers.Read more about this at the BBC's Tech page
The month-old Committee to Protect Bloggers' is asking those with blogs to dedicate their sites on 22 February to the 'Free Mojtaba and Arash Day'.
Arash Sigarchi and Mojtaba Saminejad are both in prison in Iran.
If you have a blog, the least you could do is put nothing on that blog exceptFree Mojtaba and Arash Day
Curt Hopkins, Committee to Protect Bloggers
Blogs are free sites through which people publish thoughts and opinions. Iranian authorities have been clamping down on prominent sites for some time.
'I hope this day will focus people,' Curt Hopkins, director of the Committee, told the BBC News website.
The group has a list of actions which it says bloggers can take, including writing to local Iranian embassies.
The Committee has deemed Tuesday 'Free Mojtaba and Arash Day' as part of its first campaign.
It is calling on the blogsphere - the name for the worldwide community of bloggers - to do what it can to help raise awareness of the plight of Mojtaba and Arash as well as other 'cyber-dissidents'.
'If you have a blog, the least you could do is put nothing on that blog except 'Free Mojtaba and Arash Day',' said Mr Hopkins. ....