function ToggleBlockVisible(id) {
elem = document.getElementById(id);
if (elem.style.display != 'block')
elem.style.display = 'block';
else
elem.style.display = 'none';
}

function addstar() {
if (document.all)
window.external.AddFavorite(document.URL, document.title);
}

function changeClass(element, styleName) {
element.className = styleName;
}