var _sfm_tracker=null;



function SFM_MoveablePopup(div_obj)

{

    var _div_obj = div_obj;

    //div_obj.handlerobj = this;



    var downposX = 0;

    var downposY = 0;

    var dragging = false;



    this.isIE    = false;

    this.isNS    = false;





    this.Init = function()

    {

        if (navigator.userAgent.indexOf("MSIE") >= 0 ||

            navigator.userAgent.indexOf("Opera") >= 0) 

        {

            this.isIE = true;

        }

        else

        {

            this.isNS = true;

        }

    }





    _div_obj.onmousedown = function(event)

    {

        var x=0;

        var y=0;



        _this = this.handlerobj;



        if (_this.isIE) 

        {

            x = window.event.clientX + 

                document.documentElement.scrollLeft + 

                document.body.scrollLeft;



            y = window.event.clientY + 

                document.documentElement.scrollTop + 

                document.body.scrollTop;

        }

        else

        {

            x = event.clientX + window.scrollX;

            y = event.clientY + window.scrollY;

        }



        _this.cursorStartX = x;

        _this.cursorStartY = y;

        _this.divStartX   = parseInt(this.style.left, 10);

        _this.divStartY   = parseInt(this.style.top,  10);



        if (this.handlerobj.isIE) 

        {

            document.attachEvent("onmousemove", _this.onmousemove);

            document.attachEvent("onmouseup",   _this.onmouseup);

            window.event.cancelBubble = true;

            window.event.returnValue = false;

        }

        else

        {

            document.addEventListener("mousemove", _this.onmousemove,   true);

            document.addEventListener("mouseup",   _this.onmouseup, true);

            event.preventDefault();

        }



        _sfm_tracker = _this;

        _this._div_obj = this;



    }



    this.onmousemove = function(event)

    {

        _this = _sfm_tracker;



        var x = 0;

        var y = 0;





        if (_this.isIE) 

        {

            x = window.event.clientX + document.documentElement.scrollLeft

              + document.body.scrollLeft;

            y = window.event.clientY + document.documentElement.scrollTop

              + document.body.scrollTop;

        }

        else

        {

            x = event.clientX + window.scrollX;

            y = event.clientY + window.scrollY;

        }



        _this._div_obj.style.left = (_this.divStartX + x - _this.cursorStartX) + "px";

        _this._div_obj.style.top  = (_this.divStartY   + y - _this.cursorStartY) + "px";



        if (_this.isIE) 

        {

            window.event.cancelBubble = true;

            window.event.returnValue = false;

        }

        else

        {

            event.preventDefault();

        }

    }



    this.onmouseup = function()

    {

         _this = _sfm_tracker;

        if (_this.isIE) 

        {

            document.detachEvent("onmousemove", _this.onmousemove);

            document.detachEvent("onmouseup",   _this.onmouseup);

        }

        else

        {

            document.removeEventListener("mousemove", _this.onmousemove,   true);

            document.removeEventListener("mouseup",   _this.onmouseup, true);

        }

        _sfm_tracker = null;

        

    }



   this.Init();

}