Problem with my ( string space ) in text to speech using phonegap

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Javascript

HTML

hi i am using text to speech in my phonegap app.
if my string content is high its not working..
when it is low it is working somewhat.
how to rectify this ?
this is my code ..
kindly guide me where i am strucking..

var html = '';
var html1='';
var stop = false;
function startupWin(result) {
// When result is equal to STARTED we are ready to play
if (result == TTS.STARTED) {
window.plugins.tts.getLanguage(win, fail);
// window.plugins.tts.speak("The text to speech service is ready");

}
}
function win(result) {
console.log(result);
}
function fail(result) {
console.log("Error = " + result);
}
function speak() {
var sp= html1.replace(/[^a-zA-Z 0-9.]+/g,'');
console.log(sp);
window.plugins.tts.speak(sp);
}
function shutdown() {
window.plugins.tts.stop();
}
function silence() {
window.plugins.tts.silence(86400000);
}
function speed(){
window.plugins.tts.speed(70);
}
<a href="javascript:speak()"></a><a href="javascript:shutdown()">
</a><a href="javascript:speed()"></a>

thanks in advance..