how do I programmatically exceute a javascript or click a button in .net 3.5 webbrowser control

how do I programatically click the button described below in a webpage on .net 3.5 webbrowser

<TD id=cellGoButton bgColor=#ffffff>&nbsp;&nbsp;
<A onclick="javascript:OnAccountChangeLocalActivity();return false;"
 title=Go class=hideOnPrint href="#"><IMG id=AcctGoButton 
class=hideOnPrint border=0
 name=AcctGoButton alt=Go align=absMiddle
 src="/N600/image/ENGLISH/btn_go.gif">
</A></TD>

or invoke the java script directly?

getHtmlElementByID("cellGoButton") would help me get the <TD element not the button

I managed to extract the jscript function form the element's html into string variable jscrpt.

I tried invoke the jscript OnAccountChangeLocalActivity()ysgin

myWebBrowser.Document.InvokeScript(jscrpt);

but it did seem not do anything.

what did i miss? Do I also have invoke the "return false" also?

or should l just somehow click the button <IMG htmlelement instead?

(there used to a forum for webbrowser, but I think that's been archived and the .net languge forum people told this kind question is off topic and ask me to repost here