Twitter bootstrap 引导导航栏折叠不工作

我真的无法找出什么是问题，不工作我的导航栏崩溃了。请告诉我这个问题的错误是什么。我已经在导航中添加了jQuery和Glyph图标。这些都是导致这个问题的原因

<!--Navigation Start-->
    <nav class="navbar navbar-default">
            <div class="container-fluid">
                <div class="navbar-header">
                    <button class="navbar-toggle" data-toggle="collapse" data-target="#navigation">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span> 
                    </button>
                    <a class="navbar-brand" href="home.html">Senid Computer</a>
                </div>
                <div class="collapse navbar-collapse" id="navigation">
                    <ul class="nav navbar-nav navbar-center">
                        <li class="active">
                            <a href="home.html">

                            <center><i class="fa fa-home medium"></i>

                            </center>Home</a>
                        </li>
                        <li class="dropdown" id="li1">
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown">

                            <center><i class="fa fa-laptop medium"></i>

                            </center>Laptops <span class="caret"></span>

                        </a>
                            <ul class="dropdown-menu" id="id1-dd">
                                <li>
                                    <a href="laptops/laptop_apple.html">Apple</a>
                                </li>
                                <li>
                                    <a href="laptops/laptop_hp.html">Hewlett Packard</a>
                                </li>
                                <li>
                                    <a href="laptops/laptop_dell.html">Dell</a>
                                </li>
                                <li>
                                    <a href="laptops/laptop_asus.html">Asus</a>
                                </li>
                            </ul>
                        </li>
                        <li>
                            <a href="desktop.html">

                            <center><i class="fa fa-desktop medium text-inverse"></i>

                            </center>Desktops</a>
                        </li>
                        <li>
                            <a href="accessories.html" class="nav-ele-color">

                            <center><i class="fa fa-gamepad medium nav-ele-color"></i>

                            </center>Accessories</a>
                        </li>
                        <li class="">
                            <a href="contact_us.html">

                            <center><i class="fa fa-phone medium text-inverse"></i>

                            </center>Contact Us</a>
                        </li>
                    </ul>
                    <ul class="nav navbar-nav navbar-right">
                        <li>
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown" id="login_main"><span id="login_main_p">Login  <span class="glyphicon glyphicon-log-in"></span></span></a>
                            <div class="dropdown-menu" id="login_div">
                                <form id="formLogin" class="form container-fluid">
                                    <div class="form-group">
                                        <label for="uname">User Name:</label>
                                        <input type="text" class="form-control" id="user_name" placeholder="User Name" value="">
                                    </div>
                                    <div class="form-group">
                                        <label for="password">Password:</label>
                                        <input type="password" class="form-control" id="password_login" placeholder="Password" value="">
                                    </div>
                                    <a href="javascript:login()" class="btn btn-success"><span class="glyphicon glyphicon-user"></span> Login</a>
                                </form>
                            </div>
                        </li>
                    </ul>
                </div>
            </div>
        </div>
    </nav>

用户名：
密码：

也尝试一下：

    <nav class="navbar navbar-default">
     <div class="container-fluid">
     <div class="navbar-header">
  <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>                        
  </button>
  <a class="navbar-brand" href="#">Site Name</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
  <ul class="nav navbar-nav">
    <li class="active"><a href="#">Home</a></li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#">Page 1 <span class="caret"></span></a>
      <ul class="dropdown-menu">
        <li><a href="#">Page 1-1</a></li>
        <li><a href="#">Page 1-2</a></li>
        <li><a href="#">Page 1-3</a></li>
      </ul>
    </li>
    <li><a href="#">Page 2</a></li>
    <li><a href="#">Page 3</a></li>
  </ul>
  <ul class="nav navbar-nav navbar-right">
    <li><a href="#"><i class="fa fa-medium"></i> Sign Up</a></li>
    <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
  </ul>
</div>
   </div>
     </nav>

这是一个常见的问题，通常是由于您的脚本在标题中的顺序。那么解决方法是什么呢？您必须使用jQuery并将其放在引导JS之前。哦，谢谢你们的帮助。请记住，您应该始终将jQuery放在第一位。您能解释一下您的答案吗？要使折叠功能在引导导航栏上工作，请在启动菜单项之前放置。然后在菜单项完成后结束标记。