function del(id) {
    $('delete_' + id).hide();
    $('delete_' + id + '_confirm').show();
}


function delCancel(id) {
    $('delete_' + id).show();
    $('delete_' + id + '_confirm').hide();
}


function delSubmit(id) {

    if (!id) {
	return false;
    }

    var url ='/api/follow/delete';
    var data = 'shelf_id=' + id;

    new Ajax.Request(url, {
	method: 'post',
	parameters: data,
	onLoading: function() {
		$('delete_' + id + '_confirm').innerHTML = '<img src="/images/icon/loading.gif" width="16" height="16" />';
	},
	onComplete: function(httpObj) {
	    
            if (httpObj.status == '200') {
		$('delete_' + id + '_confirm').innerHTML = '<span class="error">フォローを解除しました。</span>';
            }
            else {
		$('delete_' + id + '_confirm').innerHTML = '<span class="error">エラー</span>';
            }
	}
    });

}