Text to speech in Web

I am doing a college project of Online screen reader. The webapp I create is basically supposed to give audio output of Text in the screen without having to use external softwares. I am really confused regarding the method I should use. I found some speech API like google speech API, but these API would return the text file in mp3 format which the browser will play later on. I found this quiet slow and inefficient since My Website should be interactive. I tried using Java Speech API, but I could work with it in only Desktop environment.
So, I am eagerly and helplessly waiting for suggestions.
Thank you!

I use stereo mix in windows 7 to record those text to speech serives as normall they charge for downloading he file, just go to sound - microphone - right click - enable stereo mix - this will nolw record everything that goes through your system.

Not all windows versions have stereo mix you may have to update your drivers

You can install some speech applications in your web. Its very easy to apply and use for special purpose. If you have site that contain this features, this application should be have by you.