可以拖动的面板（Panels）

html部分：
<div class="col-sm-2  left_nav" id="float_fixed" >
    <div class="panel panel-primary console" id="fixedPosition">
        <div class="panel-heading" id="float_header" ondragstart="return false">
            <h3 class="panel-title text-center" ondragstart="return false">
               菜单栏
            </h3>
        </div>
        <div class="panel-body">
            <div class="panel-group " >
                <div class="panel panel-default">
                    <div class="panel-heading ">
                        <h4 class="panel-title ">
                            <a data-toggle="collapse" data-parent="#accordion"
                               href="#collapseOne">
                                个人信息
                            </a>
                        </h4>
                    </div>

                    <div id="collapseOne" class="panel-collapse collapse in">
                        <div class="panel-body">
                            <a  id="resume">基本信息</a><hr>
                            <a  id="resume_xg">信息修改</a><hr>
                        </div>
                    </div>
                </div>

                <div class="panel panel-default">
                    <div class="panel-heading">
                        <h4 class="panel-title">
                            <a data-toggle="collapse" data-parent="#accordion"
                               href="#collapseTwo">
                                用户管理
                            </a>
                        </h4>
                    </div>
                    <div id="collapseTwo" class="panel-collapse collapse">
                        <div class="panel-body">
                            <a  id="user_student">学生</a><hr>

                            <a  id="user_teacher">老师</a><hr>

                            <a  id="super_admin">超级管理员</a>

                        </div>
                    </div>
                </div>

                <div class="panel panel-default">
                    <div class="panel-heading">
                        <h4 class="panel-title">
                            <a data-toggle="collapse" data-parent="#accordion"
                               id="new_user">
                                新增用户
                            </a>
                        </h4>
                    </div>

                </div>

                <div class="panel panel-default">
                    <div class="panel-heading">
                        <h4 class="panel-title">
                            <a data-toggle="collapse" data-parent="#accordion"
                               href="#collapseFour">
                                课程信息管理
                            </a>
                        </h4>
                    </div>
                    <div id="collapseFour" class="panel-collapse collapse">
                        <div class="panel-body">
                            <a  id="sd_college">水利水电学院</a><hr>
                            <a  id="jsj_college">计算机学院</a><hr>
                            <a  id="wl_college">物理工程学院</a>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

js部分：

$("#float_fixed").css({
 "position":"fixed",
 "z-index":"40",
 "top":"30px",
 "left":"5px"
});
$("#float_header").css("cursor","pointer");
$("#float_header").mousedown(fnFixedMOV);
        function fnFixedMOV(e){
             //$("#float_fixed").stop();
             $("#float_fixed").off("mouseleave");
             $("#float_header").off("mouseover");
             $(document).off("mousemove");
             //$(window).off("resize");
           var obj = {};
           var oCoord = $("#float_fixed").offset();
           obj.mouseX= e.pageX-oCoord.left;
           obj.mouseY = e.pageY-oCoord.top;
           $(document).on("mousemove",obj,function(event){
               var y = event.pageY-(event.data.mouseY+$(window).scrollTop());
               var x = event.pageX-event.data.mouseX;
                $("#float_fixed").css("top",y+"px");
                $("#float_fixed").css("left",x+"px");
           });//移动事件结束
           
           /*松开鼠标是的事件*/
           $(this).mouseup(fnFixedMouUP);

        }
                function fnFixedMouUP(event) {
               /* Act on the event */
               $("#float_fixed").off("mouseleave");
               $(document).off("mousemove");
               
               }