<div class="modal fade" id="modalID"  tabindex="-1" role="dialog" 

    aria-labelledby="myModal"  aria-hidden="true" >

    <div class="modal-dialog">

        <div class="modal-content">

            <form method="POST" id="" action="" onSubmit="">

                <div class="modal-header popup_box_head_style">

                    <button type="button" class="close popup_box_close_style" style="color:white"

                    data-dismiss="modal" aria-hidden="true">

                      ×

                    </button>

                 <div class="modal-footer popup_box_footer_style" style="text-align:center">

                   <button type="button" class="btn btn-default btn-lg" style="background-color:#4497f8;color:white;border:1px solid #4497f8"

                        data-dismiss="modal">关闭

                    </button>

            </div>

            </form>

        </div>

    </div>

</div>

/** 拖拽模态框*/

        var mouseStartPoint = {"left":0,"top":  0};

        var mouseEndPoint = {"left":0,"top":  0};

        var mouseDragDown = false;

        var oldP = {"left":0,"top":  0};

        var moveTartet ;

        $(document).ready(function(){

            $(document).on("mousedown",".modal-header",function(e){

                if($(e.target).hasClass("close"))//点关闭按钮不能移动对话框

                    return;

                mouseDragDown = true;

                moveTartet = $(this).parent();

                mouseStartPoint = {"left":e.clientX,"top":  e.clientY};

                oldP = moveTartet.offset();

            });

            $(document).on("mouseup",function(e){

                mouseDragDown = false;

                moveTartet = undefined;

                mouseStartPoint = {"left":0,"top":  0};

                oldP = {"left":0,"top":  0};

            });

            $(document).on("mousemove",function(e){

                if(!mouseDragDown || moveTartet == undefined)return;

                var mousX = e.clientX;

                var mousY = e.clientY;

                if(mousX < 0)mousX = 0;

                if(mousY < 0)mousY = 25;

                mouseEndPoint = {"left":mousX,"top": mousY};

                var width = moveTartet.width();

                var height = moveTartet.height();

                mouseEndPoint.left = mouseEndPoint.left - (mouseStartPoint.left - oldP.left);//移动修正，更平滑

                mouseEndPoint.top = mouseEndPoint.top - (mouseStartPoint.top - oldP.top);

                moveTartet.offset(mouseEndPoint);

            });

        });