JQ弹出框移动-插件分享~~~

<script src="js/jQuery8.3.js" type="text/javascript"></script>
<script type="text/javascript">
  $(document).ready(function(){
        $(".happy").click(function(){
              $(".loadbox").fadeIn("slow");
            });
        $(".no").click(function(){
              $(".loadbox").fadeOut("slow");
            });
          $(".loadbox").easydrag();
      });
</script>

插件网络下载：<script type="text/javascript" src="js/jquery.beta.js"></script>

(function($){

    // to track if the mouse button is pressed
    var isMouseDown    = false;

    // to track the current element being dragged
    var currentElement = null;

    // callback holders
    var dropCallbacks = {};
    var dragCallbacks = {};
    
    // bubbling status
    var bubblings = {};

    // global position records
    var lastMouseX;
    var lastMouseY;
    var lastElemTop;
    var lastElemLeft;
    
    // track element dragStatus
    var dragStatus = {};    

    // if user is holding any handle or not
    var holdingHandler = false;

    // returns the mouse (cursor) current position
    $.getMousePosition = function(e){
        var posx = 0;
        var posy = 0;

        if (!e) var e = window.event;

        if (e.pageX || e.pageY) {
            posx = e.pageX;
            posy = e.pageY;
        }
        else if (e.clientX || e.clientY) {
            posx = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
            posy = e.clientY + document.body.scrollTop  + document.documentElement.scrollTop;
        }

        return { 'x': posx, 'y': posy };
    };

    // updates the position of the current element being dragged
    $.updatePosition = function(e) {
        var pos = $.getMousePosition(e);

        var spanX = (pos.x - lastMouseX);
        var spanY = (pos.y - lastMouseY);

        $(currentElement).css("top",  (lastElemTop + spanY));
        $(currentElement).css("left", (lastElemLeft + spanX));
    };

    // when the mouse is moved while the mouse button is pressed
    $(document).mousemove(function(e){
        if(isMouseDown && dragStatus[currentElement.id] != 'false'){
            // update the position and call the registered function
            $.updatePosition(e);
            if(dragCallbacks[currentElement.id] != undefined){
                dragCallbacks[currentElement.id](e, currentElement);
            }

            return false;
        }
    });

    // when the mouse button is released
    $(document).mouseup(function(e){
        if(isMouseDown && dragStatus[currentElement.id] != 'false'){
            isMouseDown = false;
            if(dropCallbacks[currentElement.id] != undefined){
                dropCallbacks[currentElement.id](e, currentElement);
            }

            return false;
        }
    });

    // register the function to be called while an element is being dragged
    $.fn.ondrag = function(callback){
        return this.each(function(){
            dragCallbacks[this.id] = callback;
        });
    };

    // register the function to be called when an element is dropped
    $.fn.ondrop = function(callback){
        return this.each(function(){
            dropCallbacks[this.id] = callback;
        });
    };
    
    // disable the dragging feature for the element
    $.fn.dragOff = function(){
        return this.each(function(){
            dragStatus[this.id] = 'off';
        });
    };
    
    // enable the dragging feature for the element
    $.fn.dragOn = function(){
        return this.each(function(){
            dragStatus[this.id] = 'on';
        });
    };
    
    // set a child element as a handler
    $.fn.setHandler = function(handlerId){
        return this.each(function(){
            var draggable = this;
            
            // enable event bubbling so the user can reach the handle
            bubblings[this.id] = true;
            
            // reset cursor style
            $(draggable).css("cursor", "");
            
            // set current drag status
            dragStatus[draggable.id] = "handler";

            // change handle cursor type
            $("#"+handlerId).css("cursor", "move");    
            
            // bind event handler
            $("#"+handlerId).mousedown(function(e){
                holdingHandler = true;
                $(draggable).trigger('mousedown', e);
            });
            
            // bind event handler
            $("#"+handlerId).mouseup(function(e){
                holdingHandler = false;
            });
        });
    }

    // set an element as draggable - allowBubbling enables/disables event bubbling
    $.fn.easydrag = function(allowBubbling){

        return this.each(function(){

            // if no id is defined assign a unique one
            if(undefined == this.id || !this.id.length) this.id = "easydrag"+(new Date().getTime());
            
            // save event bubbling status
            bubblings[this.id] = allowBubbling ? true : false;

            // set dragStatus 
            dragStatus[this.id] = "on";
            
            // change the mouse pointer
            $(this).css("cursor", "move");

            // when an element receives a mouse press
            $(this).mousedown(function(e){
                
                // just when "on" or "handler"
                if((dragStatus[this.id] == "off") || (dragStatus[this.id] == "handler" && !holdingHandler))
                    return bubblings[this.id];

                // set it as absolute positioned
                $(this).css("position", "absolute");

                // set z-index
                $(this).css("z-index", parseInt( new Date().getTime()/1000 ));

                // update track variables
                isMouseDown    = true;
                currentElement = this;

                // retrieve positioning properties
                var pos    = $.getMousePosition(e);
                lastMouseX = pos.x;
                lastMouseY = pos.y;

                lastElemTop  = this.offsetTop;
                lastElemLeft = this.offsetLeft;

                $.updatePosition(e);

                return bubblings[this.id];
            });
        });
    };

})(jQuery);