Jquery 在按钮上打开弹出窗口，单击以进行引导

当我点击下面的按钮时

   <button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
        Launch demo modal
    </button>

我在下面打开弹出窗口（模态）

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                <h4 class="modal-title" id="myModalLabel">Modal title</h4>
            </div>
            <div class="modal-body">
                ...
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

我参考下面的例子，

http://getbootstrap.com/javascript/

我的问题：

如何使用 javascript/jquery 在按钮单击时打开#myModal？

任何帮助将不胜感激。

Thanks.

给一个 ID 来唯一标识该按钮，比方说myBtn

// when DOM is ready
$(document).ready(function () {

     // Attach Button click event listener 
    $("#myBtn").click(function(){

         // show Modal
         $('#myModal').modal('show');
    });
});

JSFIDDLE