var op = 100;

function fadeDown() {
  var elP = document.getElementById('txt-p');
  if (op > 0) {
    op -= 1;
    elP.style.opacity = (op/100);
    elP.style.filter = 'alpha(opacity=' + op + ')';
    setTimeout("fadeDown()" , 25);
  } else if (op == 0) {
    elP.style.opacity = '0';
    elP.style.filter = 'alpha(opacity=0)';
    changeTxt();
  }
}

function changeTxt() {
  var elP = document.getElementById('txt-p');
  if (fr < 8) {
    fr += 1;
  } else {
    fr = 1;
  }
  elP.innerHTML = frasi[fr];
  setTimeout("fadeUp()" , 1000);
}

function fadeUp() {
  var elP = document.getElementById('txt-p');
  if (op < 100) {
    op += 1;
    elP.style.opacity = (op/100);
    elP.style.filter = 'alpha(opacity=' + op + ')';
    setTimeout("fadeUp()" , 25);
  } else if (op == 100) {
    elP.style.opacity = '1';
    elP.style.filter = 'alpha(opacity=100)';
    setTimeout("fadeDown()" , 6000);
  }
}

function startup() {
  setTimeout("fadeDown()" , 6000);
}

window.onload = startup;