function Set(pname, pnum) {
  var radioGroup=document.getElementsByName(pname);
  radioGroup[pnum-1].checked=true;
};

function GetSelected(pname)
{
  var radioGroup=document.getElementsByName(pname);
  for(i=0;i<radioGroup.length;i++) {
    if(radioGroup[i].checked) return i;
  };
}

var lspan;

function obtainScript (href) {
  with (document) {
    var span = null;
    span = body.appendChild(createElement("SPAN"));
    span.style.display = 'none';
    span.innerHTML = 'Text for stupid IE.<s'+'cript></' + 'script>';
    setTimeout(function() {
      var s = span.getElementsByTagName("script")[0];
      s.language = "JavaScript";
      if (s.setAttribute) s.setAttribute('src', href); else s.src = href;
    }, 10);
    lspan = span;
  }
}

function cleanupScript()
{
  var span = lspan;
  if (span) {
    lspan = null;
    setTimeout(function() {
      span.parentNode.removeChild(span);
    }, 50);
  }
  return false;
}
		
function Price()
{
  var tarplan=GetSelected("tarplan");
  var ztime=GetSelected("ztime"); 
  if(lspan!=null) cleanupScript();
  obtainScript('price.php?tarplan='+tarplan+'&ztime='+ztime);
};