Sorry: obiger Code kann ja nicht klappen - hier die Code-Refernz von Microsoft für Netmeeting callto:-Befehle
<object ID=NetMeeting CLASSID="CLSID:3E9BAF2D-7A79-11d2-9334-0000F875AE17">
<PARAM NAME = "MODE" VALUE = "DataOnly"> </object>
<BR><BR>
<input type=button value ="callto:"id=CallToBtn onclick=NetMeeting.CallTo(CallToAddress.value)>
<input type=text id=CallToAddress>
<input type=button value ="Hangup"id=HangUpBtn onclick=NetMeeting.LeaveConference()>
<input type=button value ="UnDock"id=UnDockBtn onclick=NetMeeting.UnDock()>