window.addOnloadEvent = function(addToOnload){
    var oldOnload;
/*    if (window.onload) {
        oldOnload = window.onload;
        window.onload = function(){
            oldOnload();
            addToOnload();
        };
    }
    else {
        window.onload = addToOnload;
    }
*/
}

var advertismentPictureNumber = 0;
function changeAdvertismentPicture(advertisementPictureLinkArray, objId, langVersion){
    advertismentPictureNumber++;
    if (advertismentPictureNumber >= advertisementPictureLinkArray.length) {
        advertismentPictureNumber = 0;
    }
    obj = document.getElementById(objId);
    obj.src = 'static/img/advertisement/ad' + advertismentPictureNumber + '_' + langVersion + '.jpg';
    objHref = document.getElementById(objId + 'Href');
    objHref.href = advertisementPictureLinkArray[advertismentPictureNumber];
}


var linkPictureNumber = 0;
function changeLinkPicture(objId, maxPictureNumber){
    linkPictureNumber++;
    if (linkPictureNumber >= maxPictureNumber) {
        linkPictureNumber = 0;
    }
    obj = document.getElementById(objId);
    obj.src = 'static/img/zdjecia/linki/linki' + linkPictureNumber + '.jpg';
}

function changePicture(id, path){
    document.getElementById("" + id).src = path;
}

function openUrl(url){
    window.open(url.href);
    url.style.color = '#EDA222';
}

function checkStringLength(elementId, stringLength, errorFieldId){
    if (document.getElementById('serchSelect').options[0].selected == false) {
        return true;
    }
    
    document.getElementById(errorFieldId).style.display = 'none';
    if (document.getElementById(elementId).value.length <= stringLength) {
        document.getElementById(errorFieldId).style.display = '';
        return false;
    }
    return true;
}

function activeLink(obj){
    obj.style.color = "#039242";
    obj.style.fontWeight = "bold";
}

function deActiveLink(obj){
    obj.style.color = "#000000";
    obj.style.fontWeight = "";
}

var galleryVisible = new Array();
function changeGalleryTableDisplayState(tableId){
    if (galleryVisible[tableId] != 'on') {
        document.getElementById(tableId).style.display = "";
        galleryVisible[tableId] = 'on';
    }
    else {
        document.getElementById(tableId).style.display = "none";
        galleryVisible[tableId] = 'off';       
    }
}