Add line before a pattern with sed?

I want to add the line "<div class="mycount2"></div>" just before the "</body>" tag in 6000 xhtml pages, what i tried is this:
Code:sed '/</body>/i <div class="mycont2"></div>' *.xhtmlbut after running the obove code got the error:
Code:sed: -e expression #1, char 12: unknown command: `<'