/* GRAFIKA effects */

function rollOver(id) {

w = document.getElementById(id);
w.style.color = '#ff7900';

w.parentNode.style.borderColor = '#b4b4b4';

}

function rollOut(id) {

w = document.getElementById(id);
w.style.color = '';
w.parentNode.style.borderColor = '';

}

/* listovani stranky_na_klic */
function pictureNext() {

if (picture_na_klic >= picture_total) { picture_na_klic = 1; window.status = 'over ->' + picture_na_klic; }
else { picture_na_klic = picture_na_klic + 1; window.status = 'plus -> ' + picture_na_klic; } 

pictureChange(picture_na_klic);
}

function picturePrev() {

if (picture_na_klic <= 1) { picture_na_klic = picture_total; window.status = 'over ->' + picture_na_klic; }
else { picture_na_klic = picture_na_klic - 1; window.status = 'minus -> ' + picture_na_klic; } 

pictureChange(picture_na_klic);
}

function pictureChange(id) {
pic = document.getElementById('picture');
pic.src = picture_dir + na_klic[id];

link = document.getElementById('picture_link');
link.href = 'javascript: popupKlic(\'' + na_link[id] + '\');';
}