var nowAlbum = 0;
var maxAlbum = 4;
function switchAlbum(down) {
if(down) {
if(nowAlbum + 1 = 0) {
$('albumbox_'+nowAlbum).style.display = 'none';
nowAlbum--;
$('albumbox_'+nowAlbum).style.display = '';
}
}
initSwitchButton();
}
function initSwitchButton(){
$('sabdown').style.display = maxAlbum-nowAlbum == 1 ? 'none' : '';
$('sabup').style.display = nowAlbum ? '' : 'none';
}
window.onload = function () {initSwitchButton();}