function str_replace(search, replace, subject) {
  return subject.split(search).join(replace);
}

function setCurrency(id, value) {
  document.getElementById(id + '_cb_1').checked = false;
  document.getElementById(id + '_cb_2').checked = false;
  document.getElementById(id + '_cb_' + value).checked = true;
  changeDisplay(id + '_cb_1_label', 'none');
  changeDisplay(id + '_cb_2_label', 'none');
  changeDisplay(id + '_cb_' + value + '_label', 'block');
  if (value == 1) {
    document.getElementById(id + '_currency').disabled = true;
    document.getElementById(id + '_currency').selectedIndex = 0;
  }
  else document.getElementById(id + '_currency').disabled = false;
}

function changeDisplay(id, value) {
	document.getElementById(id).style.display = value;
}

function showItem(id) {
	document.getElementById(id).style.visibility = 'visible';
}

function hideItem(id) {
	document.getElementById(id).style.visibility = 'hidden';
}

if (navigator.userAgent.indexOf("Linux") != -1) document.write('<link href="/css/styles_nix.css" rel="stylesheet" type="text/css" />');
if (navigator.appName == 'Opera') document.write('<link href="/css/opera.css" rel="stylesheet" type="text/css" />');