function zmenaProduktu(){
var ind = document.getElementById("produkty").value;
var oatyp = document.getElementById("typ");

for (var i=(oatyp.options.length-1); i>=0; i--) oatyp.options[i] = null;

try
{
    var eachGroup = oatyp.firstChild;
    while ('OPTGROUP' == eachGroup.tagName)
    {
       lastGroup = eachGroup;
       eachGroup = lastGroup.nextSibling;
       oatyp.removeChild(lastGroup)
    }
}
 catch(er){}


var pole = Array();
var ret = "";
var poc = 0;

var objOption=document.createElement("option")
objOption.innerHTML = "-- vyberte typ --"
objOption.value = ""
oatyp.appendChild(objOption)

poc++;
for (var i=0; i<poleProdukt.length; i++)
{
          poleProduktX = poleProdukt[i].split("#;");
          /*1#;6#;Systémy pro malé pracovní skupiny*/

          if (ind == poleProduktX[0])
          {
              //var optGroup = document.createElement('optgroup')
              //*optGroup.label = poleProduktX[2];

                for (var ii=0; ii<poleTyp.length; ii++)
                    {
                              /*,6,#;nadpisv*/
                              poleTypX = poleTyp[ii].split("#;");
                              if (poleTypX[0].indexOf(","+poleProduktX[1]+",") != -1)
                              {
                                       //*alert(poleTypX[1]+poleProduktX[2]);
                                        var objOption=document.createElement("option")
                                        objOption.innerHTML = poleTypX[1]
                                        objOption.value = poleTypX[2]
                                        oatyp.appendChild(objOption)
                                        //*optGroup.appendChild(objOption)
                              }
                    }
               //* oatyp.appendChild(optGroup)
          }
}
}