bootstrap警告框隐藏和显示

JS

$('#alertTest').modal({
    backdrop:true,
    keyboard:true,
    show:true
});
return false; 

HTML

<div id="alertTest" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
        <h3 id="myModalLabel">提示标题</h3>
    </div>
    <div class="modal-body">
        <p>提示内容！</p>
    </div>
    <div class="modal-footer">
        <button class="btn" data-dismiss="modal" aria-hidden="true">关闭</button>
    </div>
</div>