function startTimer(){
        var x = 3000 //Timer
        var i = 0 //Array element to use!
        var id = ["id1","id2","id3"];
        if(x == 0){
            document.getElementById(id[i-1]).style.display = 'none';
            document.getElementById(id[i]).style.display = 'block';
        }
        startTimer();
    }