window.onload = function() {
    targetBlank();
}


$(function() {
	$('a.lightbox').lightBox({fixedNavigation:true});
});

function targetBlank() {
    var elements = getElementsByClass("target_blank");

    for (var i = 0; i < elements.length; i++) {
        elements[i].onclick = function(e) {
            window.open(this.href);
            return preventDefaultAction(e);
        }
    }
}



function preventDefaultAction(e) {
  if (e && e.preventDefault) {
      e.preventDefault;
  } else {
      window.event.returnValue = false;
  }
  return false;
}

// vrátí pole elementů nalezených podle class
function getElementsByClass( searchClass, domNode, tagName) {
	if (domNode == null) domNode = document;
  if (tagName == null) tagName = '*';

  var el = new Array();
  var tags = domNode.getElementsByTagName(tagName);
  var tcl = " "+searchClass+" ";

  for(i=0,j=0; i<tags.length; i++) {
    var test = " " + tags[i].className + " ";
    if (test.indexOf(tcl) != -1)
     el[j++] = tags[i];
  }
  return el;
}

function setCssClassClicked(el)
  {
    var anchorsHolder = document.getElementById('menuLeft');
    
    if (anchorsHolder)
    {
      var anchors = anchorsHolder.getElementsByTagName('a');
      
      if (anchors.length > 0) {
        for (var i = 0; i < anchors.length; i++) {
          if(anchors[i].className != "pdf") {
          	anchors[i].className = "";
          }
        }
      }
      el.className = "clicked";
    }
  }

function bar(url){
      wasOpen  = false;
      win = window.open(url);    
      return (typeof(win)=='object')?true:false;
}

function zobraz_foto(obrazek, popis) {
    
  var sirkaOkna;
  var vyskaOkna;
  var obr = new Image();
  obr.src = "./images/fotky/"+obrazek;
  
  //alert(obr.width);
  
  var sirka = obr.width;
  var vyska = obr.height;
                
    with(screen) {
     sirkaOkna=availWidth;    
     vyskaOkna=availHeight;     
   }
                              
         sirkaOkna -= sirka;
         sirkaOkna -= 25; //scrollbar
         sirkaOkna /= 2;
         
         vyskaOkna -= vyska;
         vyskaOkna /= 2;
    
    
    
    var okno_fotka = window.open("./inc/detail_foto.php?img="+obrazek+"&popis="+popis+"&sirka="+sirka+"&vyska="+vyska+"", "okno_fotografie", "width=" + sirka + ",height=" + vyska + ", left="+sirkaOkna+", top="+vyskaOkna+", menubar=no, directories=no, toolbar=no, location=no, status=no, scrollbars=no, resizable=no");
    okno_fotka.focus();
 }

 function zobraz(elementId)
 {
	if (document.getElementById(elementId)) 
	{
		document.getElementById(elementId).style.display = 'block';
	}
 }

 function schovej(elementId)
 {
	if( document.getElementById( elementId ) ) 
	{
	document.getElementById( elementId ).style.display = 'none';
 	}
 }
 
  function svit(elementId)
 {
	if (document.getElementById(elementId)) 
	{
		document.getElementById(elementId).style.backgroundColor= '#FEB31A';
	}
 }
 
  function zhasni(elementId)
 {
	if (document.getElementById(elementId)) 
	{
		document.getElementById(elementId).style.backgroundColor = '#3D74AC';
	}
 }