function mySetInterval(fn, milliSec,count){

        function interval(){

            if(typeof count==='undefined'||count-->0){

                setTimeout(interval, milliSec);

                try{

                    fn()

                }catch(e){

                    t = 0;

                    throw e.toString();

                }

            }

        }

        setTimeout(interval, milliSec)

    }