function setVariable(id) {

  div_id = new Array();

  div_id[0] = "newsbox0";
  div_id[1] = "newsbox1";
  div_id[2] = "newsbox2";
  div_id[3] = "newsbox3";

  var ran_unrounded=Math.random()*(div_id.length-0.5);
  var ran_number=Math.round(ran_unrounded);
  var i = 0;

  while (i < div_id.length && ran_number != i) {
    var newsboxname = "newsbox"+i;
    document.getElementById(newsboxname).style.display = 'none';
    i++;
  }


  visible_id = ran_number;
  window.setTimeout("newsbox_change()",10000);

};

function newsbox_change() {

  old_div_id = div_id[visible_id];

  var ran_unrounded=Math.random()*(div_id.length-0.5);
  var ran_number=Math.round(ran_unrounded);

  visible_id = ran_number;


  new_div_id = div_id[visible_id];

  document.getElementById(old_div_id).style.display = 'none';
  document.getElementById(new_div_id).style.display = 'block';

  window.setTimeout("newsbox_change()",10000);


};