Submitting A Form With My Program Which Is Using The WebBrowser Control?

I am having trouble submitting a form with my program which is using the WebBrowser control.

WebBrowser.Document.All("follow").InvokeMember("click")

I tried this but it did not work. The result is that the WebBrowser displays "This program cannot display the webpage" error page. The problem I think, is that the page is using javascript when it comes to submitting the form.This is the code for the submit button:

<input type="button" onclick="submitIt()" value="Follow" name="follow"/>

And this is the javascript for the onclick="submitIt()"

function submitIt(){
document.formx.submit();
}

Is there any way to invoke that javascript submitIt() method through VB.net?