OK, this works only in Opera browser. You can create a custom search so that you can easily searching some website by just typing a keyword. For Ex., if I type 'w juventus' in my address bar, I will be able to search Wikipedia for 'Juventus'.
So I created a custom search for the Quick Reply button on this page and assigned it a keyword. So whenever I type that keyword and a message in the address bar, it's posted here directly. I don't even have to open this page!