sfHover = function() {
  if(document.getElementById("nav")) {
  	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
  	for (var i=0; i<sfEls.length; i++) {
  		sfEls[i].onmouseover=function() {
  			this.className+=" sfhover";
  		}
  		sfEls[i].onmouseout=function() {
  			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
  		}
  	}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function hide_help () {
	$('show').style.display = 'block';
	$('hide').style.display = 'none';
}

function animHandler(carouselID, status, direction) {
  var region = $(carouselID).down(".carousel-clip-region")
  if (status == "before") {
    Effect.Fade(region, {to: 1, queue: { position:'end', scope: "carousel" }, duration: 0.2})
  }
  if (status == "after") {
    Effect.Fade(region, {to: 1, queue: { position:'end', scope: "carousel" }, duration: 0.2})
  }
}

function initCarousel_html_carousel() {
  if(document.getElementById('html-carousel')) {
    carousel = new Carousel('html-carousel', {animHandler:animHandler, animParameters:{duration:0.5}, buttonStateHandler:buttonStateHandler, nextElementID:'next-arrow', prevElementID:'prev-arrow', size:31})
  }
};

EventQB.observe(window, 'load', initCarousel_html_carousel);

/**
*Funkce pro zmenu obrazku
* 
*@param newImgSrc relativni cesta k obrazku
*@param newImgDesc popisek obrazku (zobrazeny pod obrazkem)
*@param width sirka obrazku
*@param height vyska obrazku
*/
function changeImg(newImgSrc, newImgDesc, width, height) {

  var mainImg = new Image(width, height);
  mainImg.src = newImgSrc;

  //maximalni pripustne rozmery pro obrazek na sirku / na vysku
  var wideImgMaxWidth = 300;
  var highImgMaxWidth = 300;
  
  //nastaveni nove cesty k obrazku
  document.images['mainImg'].src = newImgSrc;
  
  //nastaveni popisku
  document.images['mainImg'].alt = newImgDesc;
  
  //nastaveni popisku obrazku
  document.getElementById('photoDescription').innerHTML = newImgDesc;
  
  //aktualizace sirky bloku s obrazkem podle rozmeru obrazku
  //obrazek je "na sirku"
  if (width == 0) {
    //osetreni, kdyby se nahodou nenacetla spravne velikost
    width = highImgMaxWidth;
  }
  if (width >= height) {
    if (width > wideImgMaxWidth) {
      setDimensions('detailPreviewDiv', 'mainImg', wideImgMaxWidth);
      } else { 
        //zachovat stejnou velikost
        setDimensions('detailPreviewDiv', 'mainImg', width);
    }
  } else {
  //obrazek je "na vysku"
    if (width > highImgMaxWidth) {
      setDimensions('detailPreviewDiv', 'mainImg', highImgMaxWidth);
      } else { 
        //zachovat stejnou velikost
        setDimensions('detailPreviewDiv', 'mainImg', width);
    }
  }
}

/**
 * nastavi spravne rozmery pro obrazek i odsazeni vedlejsiho sloupce
 */ 
function setDimensions(divId, imgName, size) {
  document.getElementById(divId).style.width = size + 'px';
  document.getElementsByName(imgName)[0].style.width = size+'px';
  /* - pokud by byla pozadovana zmena sirky sloupce s adresou...
  var ddWidth = 730 - size;
  if(ddWidth < 220) {
    ddWidth = 220;
  }
  document.getElementById("detailDescr").style.width = ddWidth + 'px';
  */
}

/**
 * obsluzna fce pro vyhledavani aktivit podle "poctu hvezdicek"
 * @param no pocet hvezdicek zadany uzivatelem
 */
function setStarCount(no) {

 /*nastaveni form. pole*/
 document.EDITOR.ratingCount.value = no;

 var pcWidth;

 /*nastaveni poctu aktivnich hvezdicek po vybrani*/
 switch(no) {
  case 1:
    pcWidth = '20%';
    break
  case 2:
    pcWidth = '40%';
    break
  case 3:
    pcWidth = '60%';
    break
  case 4:
    pcWidth = '80%';
    break
  case 5:
    pcWidth = '100%';
    break
  }
 document.getElementById('starCount').style.width = pcWidth;
}


/*
* Zobrazi blok s vyberem jazyka
*/
function showLanguageSelector() {
  document.getElementById('footer_language').style.display = "block";
  return false;
}

/*
* Skryje blok s vyberem jazyka
*/
function hideLanguageSelector() {
  document.getElementById('footer_language').style.display = "none";
  
}

/**
 * Nastavi styly pro scrollovaci box s novinkami, protoze pro pripad vypnuteho 
 * JS jsou nastaveny jine styly
 */ 
function setOverFlow() {
  document.getElementById('news_slider').style.overflow = "hidden";
  
  
  /*nastaveni spravne sirky polozek - pokud je vyply JS, maji jinou sirku*/
  var lis = document.getElementById('news_slider').getElementsByTagName('li');
  
  for (i = 0; i < lis.length; i++) {
	   lis[i].style.width = '167px';
  }
}