// Create the Sapi SpVoice object

var VoiceObj = new ActiveXObject("Sapi.SpVoice");

// ChangeVoice() function:

// This function sets the newly selected voice choice from the Voice

// Select box on the Voice object.

function ChangeVoice() {

var i = parseInt(idsVoices.value);

VoiceObj.Voice = VoiceObj.GetVoices().Item(i);

}

// ChangeAudioOutput() function:

// This function sets the newly selected audio output choice from the

// Audio Output Select box on the Voice object.

function ChangeAudioOutput() {

var i = parseInt(idsAudioOutputs.value);

VoiceObj.AudioOutput = VoiceObj.GetAudioOutputs().Item(i);

}

// IncRate() function:

// This function increases the speaking rate by 1 up to a maximum

// of 10.

function IncRate() {

if(VoiceObj.Rate < 10) {

VoiceObj.Rate = VoiceObj.Rate + 1;

}

}

// DecRate() function:

// This function decreases the speaking rate by -1 down to a minimum

// of -10.

function DecRate() {

if(VoiceObj.Rate > -10) {

VoiceObj.Rate = VoiceObj.Rate - 1;

}

}

// IncVol() function:

// This function increases the speaking volume by 10 up to a maximum

// of 100.

function IncVol() {

if(VoiceObj.Volume < 200) {

VoiceObj.Volume = VoiceObj.Volume + 10;

}

}

// DecVol() function:

// This function decreases the speaking volume by -10 down to a minimum

// of 0.

function DecVol() {

if(VoiceObj.Volume > 9) {

VoiceObj.Volume = VoiceObj.Volume - 10;

}

}

// SpeakText() function:

// This function gets the text from the textbox and sends it to the

// Voice object's Speak() function. The value "1" for the second

// parameter corresponds to the SVSFlagsAsync value in the SpeechVoiceSpeakFlags

// enumerated type.

function SpeakText() {

if(idbSpeakText.value == "SpeakText") {

// Speak the string in the edit box

try {

VoiceObj.Speak(idTextBox.value, 2);

}

catch(exception) {

alert("Speak error");

}

}

else if(idbSpeakText.value == "Stop") {

// Speak empty string to Stop current speaking. The value "2" for

// the second parameter corresponds to the SVSFPurgeBeforeSpeak

// value in the SpeechVoiceSpeakFlags enumerated type.

VoiceObj.Speak("", 2);

}

}