function show() {
document.getElementById('comment').style.display = 'block';
document.getElementById('link').style.display = 'none';
document.getElementById('linkheader').style.display = 'block';


}
function hide() {
document.getElementById('comment').style.display = 'none';
document.getElementById('link').style.display = 'block';
document.getElementById('linkheader').style.display = 'none';
}