function wopen(url, name, w, h)
{
  w += 32;
  h += 96;
  wleft = (screen.width - w) / 2;
  wtop = (screen.height - h) / 2;
  var win = window.open(url,
    name,
    'width=' + w + ', height=' + h + ', ' +
    'left=' + wleft + ', top=' + wtop + ', ' +
    'location=no, menubar=no, ' +
    'status=no, toolbar=no, scrollbars=no, resizable=no');
  win.resizeTo(w, h);
  win.moveTo(wleft, wtop);
  win.focus();
}
function setDivHeight() {
   var browserName = navigator.appName;
   var dLeft = document.getElementById('mainLeft');
   var dLeftBoxMenu = document.getElementById('leftBoxMenu');
   var dLeftBox = document.getElementById('leftBox');
   var dLeftBottom = document.getElementById('leftBottom');
   var dRight = document.getElementById('mainRight');
   var dRight1 = document.getElementById('main1');
   var dCatalogNav = document.getElementById('catalogNav');
   var dRight2 = document.getElementById('main2');
   
   var dhLeft = dLeft.offsetHeight;
   var dhLeftBoxMenu = dLeftBoxMenu.offsetHeight;
   var dhLeftBox = dLeftBox.offsetHeight;
   var dhRight = dRight.offsetHeight; 
   var dhRight1 = dRight1.offsetHeight;
   if (dCatalogNav) var dhCatalogNav = dCatalogNav.offsetHeight;
   if (dRight2) var dhRight2 = dRight2.offsetHeight;
   
   if (dhLeft<dhRight) {
      // leva cast
      if (browserName == "Microsoft Internet Explorer") dLeftBottom.style.height = dhRight-dhLeftBoxMenu-dhLeftBox-30 + 'px';
      else dLeftBottom.style.height = dhRight-dhLeftBoxMenu-dhLeftBox-22 + 'px';
   } else {
      // prava cast - pouze vrsek
      if (!dRight2) {
          if (browserName == "Microsoft Internet Explorer") dRight1.style.height = dhLeft-20 + 'px';
          else dRight1.style.height = dhLeft-8 + 'px';
      }
      else {
          // prava cast - vrsek + navigace + spodek
          if (dCatalogNav) {
              if (browserName == "Microsoft Internet Explorer") dRight2.style.height = dhLeft-dhRight1-dhCatalogNav-56 + 'px';
              else dRight2.style.height = dhLeft-dhRight1-dhCatalogNav-36 + 'px';
          }
          // prava cast - vrsek + spodek
          else {
              if (browserName == "Microsoft Internet Explorer") dRight2.style.height = dhLeft-dhRight1-48 + 'px';
              else dRight2.style.height = dhLeft-dhRight1-28 + 'px';
          }
      }
   } 
}