function okno(url) 
   {
      msg=window.open(url,"okienko","height=550,width=650,resizable=0,scrollbars=yes,menubar=no,toolbars=no");
      msg.window.focus();
   }

   function OpenWindow(url,sizeX,sizeY)
   {
      var width = sizeX + 30;
      var height = sizeY + 30;

      var aw = screen.availWidth;
      var ah = screen.availHeight;

      var msg=window.open(url, "PopUp", 'width=' + width + ',height=' + height + ', left = '+ (aw-width)/2 +', top = '+ (ah-height)/2 +' , resizable=1, scrollbars=yes, menubar=no, toolbars=no');
      msg.window.focus();
   }