function swapImage(id,idlink,path,link){
    var el = document.getElementById(id);
    var lin = document.getElementById(idlink);
    lin.count = lin.count || 0;
    el.count = el.count || 0;
    el.src = path[el.count];
    lin.href = link[lin.count];
    el.count = (el.count + 1) % path.length;    lin.count = (lin.count + 1) % link.length;
}