function csikoz() {
  var tablak=document.getElementsByTagName("TABLE");
  var sor=0;

  for (i=0;i<tablak.length;i++)
    with (tablak[i]) 
      if (className=="csikos") {
        for (t=0;t<childNodes.length;t++) if (childNodes[t].tagName=='TBODY') with (childNodes[t]) {
          sor=0;
          for(j=0;j<childNodes.length;j++) {
            if(childNodes[j].nodeName=='TR') {
              row=childNodes[j].childNodes;
              sor=1-sor;
              for(k=0;k<row.length;k++)
                if (row[k].nodeName=='TD')
                  row[k].style.backgroundColor=szinek[sor];
            } // if TR
          } // for tbody children
        } // for table children
      } // with tablak[i]
} // function csikoz