function displayImgPopup(imName,imWidth,imHeight,boxId,popisBox,popis,autorBox,autor)    { 
   
      var s_top = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop;
     
      var imTop  = Math.round((screen.availHeight-imHeight)/2) + s_top - 120;
           
      var imLeft = Math.round((screen.width-imWidth)/2);
            
     // alert('imLeft: ' + imLeft +  '\navailWidth: ' + screen.availWidth + '\n\nimTop: ' + imTop + '\navailHeight: ' + screen.availHeight + '\n\nScrollTop: ' + s_top);
      
      
      document.getElementById(boxId).style.top = imTop + "px"; 
      document.getElementById(boxId).style.left = imLeft + "px"; 
       
      document.getElementById(boxId).style.display = 'block'; 
      document.getElementById(boxId).style.width = (imWidth + 6) + "px"; 
      
      document.ap.src = imName; 
      document.ap.style.width = imWidth; 
      document.ap.style.height = imHeight; 
      
     
      if(navigator.appName == "Microsoft Internet Explorer") {
                                                              if(document.getElementById('iespacebox')) document.getElementById('iespacebox').style.display = 'block';
      } 
      
      if(popis == "") document.getElementById(popisBox).style.display = "none";
        
         else {
               document.getElementById(popisBox).style.display = "block";
               document.getElementById(popisBox).style.color = "white";
               document.getElementById(popisBox).style.width = (imWidth - 10) + "px"; 
               document.getElementById(popisBox).innerHTML = popis;                
         }
    
    
      if(autor == "") document.getElementById(autorBox).style.display = "none";
    
       else {
            document.getElementById(autorBox).style.display = "block"; 
            document.getElementById(autorBox).style.width = (imWidth - 10) + "px";
            document.getElementById(autorBox).innerHTML = "Foto: " + autor;
       }
    
} // end function



function closeImg()  {

 document.getElementById('imgbox').style.display='none';
 document.ap.src='/images/icons/nacitam_obrazek.gif';
 
  if(navigator.appName == "Microsoft Internet Explorer") {
                                                          if(document.getElementById('iespacebox')) document.getElementById('iespacebox').style.display = 'none';
  } 

} // end function