function OpenWin(url, w, h) {
 var sw = screen.width;
 var sh = screen.height;
 var w_max=0;
 var h_max=0;
 if (sw<800) {
  w_max = 656; 
  h_max = 440;
 }
 else {
  if (sw<1024) {
   w_max = 796; 
   h_max = 550;
  }
  else {
   if (sw<1280) {
    w_max = 1020; 
    h_max = 760;
   }
   else {
    w_max = 1276;
    h_max = 760;
   }
  }
 }
 if ((w==0) && (h==0)) {
  w=w_max;
  h=h_max;
 }
 else {
  if (w>w_max) {
   w=w_max; 
   h=h+25;
  }
  if (h>h_max) {
   h=h_max; 
   w=w+25;
   if (w>(sw-5)) { w=sw-5; }
  }
 }
 url.target = '_blank';
 /*
 remotewin = window.open('','PanoGal');   // pokud je už otevřené, předá jeho handle
 if (remotewin.location.href!='') {
// if (!remotewin.closed && remotewin.location) {
  remotewin.location.href = url;
  remotewin.resizeTo(w,h);
 }
 else {
  remotewin = window.open(url.href,'PanoGal','toolbar=0,location=0,height='+h+',width='+w+',left=2,top=2,scrollbars=1,resizable=1');
 }
*/ 
 remotewin = window.open(url.href,'PanoGal','toolbar=0,location=0,left=2,top=2,scrollbars=1,resizable=1');
 remotewin.resizeTo(w,h);
 remotewin.focus(); 
 return false;
}