Click Submit button In Webbrowser

I'm trying to use webbrowser control to automate some work. What I need do is: 1) login [login to view URL], 2) create a knol, then 3) submit it. I make 1) & 2) work already, but somehow, after fill in all information, I can not make it submit in program. please create an account on [login to view URL], login, fill in something, then at the right side, there is a "submit" link/button (but it is not a regular link/button). all I need you do is: simulate the click of the mouse to submit whatever you filled in. However, it should be able to do this when the browser is not the current window. thanks