// JavaScript Document
   var zmenaradia = new Array('radio1', 'radio2', 'radio3', 'radio4', 'radio5', 'radio6', 'radio7', 'radio8', 'radio9','radio10','radio11', 'radio12','radio13', 'radio14','radio15','radio16', 'radio17','radio18', 'radio19','radio20','radio21');

        function prepniradio(id) {
          for (var i=0; i<zmenaradia .length; i++) {
            document.getElementById(zmenaradia [i]).style.display = (zmenaradia [i] == id ? 'block' : 'none');
          }
          return false;
        }  


function funkcniPrepniRadio(id)
{
  var s = document.getElementsByTagName("div");
  for(i=0; i<s.length;i++)
  {
    if (s.item(i).id.length>5)
      if (s.item(i).id.substring(0,5)=="radio")
        if (s.item(i).id=="radio"+id)
          s.item(i).style.display="block";
        else
          s.item(i).style.display="none";
  }
}