Changes

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<h3> Proposed Web Telephony Proposal: Enhance WebTelephony API to hold a call </h3><p>interface nsIDOMTelephony&#160;: nsIDOMEventTarget<br />{<br /> nsIDOMTelephonyCall dial(in DOMString number);</p><p>attribute boolean muted;<br /> attribute boolean speakerEnabled;</p><p>// The call that is "active", i.e. receives microphone input and tones<br /> // generated via startTone.<br /> readonly attribute jsval active;</p><p>// Array of all calls that are currently connected.<br /> readonly attribute jsval calls;</p><p>void startTone(in DOMString tone);<br /> void stopTone();</p><p>attribute nsIDOMEventListener onincoming;<br /> attribute nsIDOMEventListener onwaiting; //new<br /> attribute nsIDOMEventListener oncallschanged;<br />};</p><p>interface nsIDOMTelephonyCall&#160;: nsIDOMEventTarget<br />{<br /> readonly attribute DOMString number;<br /> readonly attribute DOMString state;<br /> // "dialing", "ringing", "busy", "connecting", "connected", "disconnecting", "disconnected", "incoming",<br /> // Add new states: "waiting", "holding", "held", "resuming"</p><p>void answer(); //make an incoming call or a waiting call into <br /> //"connected"<br /> void hangUp(); <br /> void holdCal(); //change a connected call into "held"<br /> void resumeCall(); //change a "held" call into connected</p><p>attribute nsIDOMEventListener onstatechange;