function aratafeedback()
  {
    document.getElementById("totnegru").style.visibility = 'visible';
    document.getElementById("sondaj").style.visibility = 'visible';
  }

function ascundefeedback()
  {
    document.getElementById("totnegru").style.visibility = 'hidden';
    document.getElementById("sondaj").style.visibility = 'hidden';
  }