$.fn.mywin = function(position, hidefunc, initPos) {
    if (position && position instanceof Object) {
        var positionleft = position.left;
        var positiontop = position.top;

        var left;
        var top;
        var windowobj = $(window);
        var currentwin = this;
        var cwinwidth;
        var cwinheight;

        var browserwidth;
        var browserheight;
        var scrollLeft;
        var scrollTop;
        function getBrowserDim() {
            browserwidth = windowobj.width();
            browserheight = windowobj.height();
            scrollLeft = windowobj.scrollLeft();
            scrollTop = windowobj.scrollTop();
        }
        function calLeft(positionleft, scrollLeft, browserwidth, cwinwidth) {
            if (positionleft && typeof positionleft == "string") {
                if (positionleft == "center") {
                    left = scrollLeft + (browserwidth - cwinwidth) / 2;
                } else if (positionleft == "left") {
                    left = scrollLeft;
                } else if (positionleft == "right") {
                    left = scrollLeft + browserwidth - cwinwidth;
                    if ($.browser.safari) {
                        left = left - 15;
                    }
                    if ($.browser.opera) {
                        left = left + 15;
                    }
                    if ($.browser.msie && $.browser.version.indexOf("8") >= 0) {
                        left = left - 20;
                    }
                } else {
                    left = scrollLeft + (browserwidth - cwinwidth) / 2;
                }
            } else if (positionleft && typeof positionleft == "number") {
                left = positionleft;
            } else {
                left = 0;
            }
        }
        function calTop(positiontop, scrollTop, browserheight, cwinheight) {
            if (positiontop && typeof positiontop == "string") {
                if (positiontop == "center") {
                    top = scrollTop + (browserheight - cwinheight) / 2;
                } else if (positiontop == "top") {
                    top = scrollTop;
                } else if (positiontop == "bottom") {
                    top = scrollTop + browserheight - cwinheight;
                    if ($.browser.opera) {
                        top = top - 25;
                    }
                } else {
                    top = scrollTop + (browserheight - cwinheight) / 2;
                }
            } else if (positiontop && typeof positiontop == "number") {
                top = positiontop;
            } else {
                top = 0;
            }
        }
        function moveWin() {
            calLeft(currentwin.data("positionleft"), scrollLeft, browserwidth, cwinwidth);
            calTop(currentwin.data("positiontop"), scrollTop, browserheight, cwinheight);
            currentwin.animate({
                left: left,
                top: top
            }, 600);
        }
//        currentwin.children(".title").children("img").click(function() {
//            if (!hidefunc) {
//                currentwin.hide("slow");
//            } else {
//                hidefunc();
//            }
//        });

        if (initPos && initPos instanceof Object) {
            var initLeft = initPos.left;
            var initTop = initPos.top;
            if (initLeft && typeof initLeft == "number") {
                currentwin.css("left", initLeft);
            } else {
                currentwin.css("left", 0);
            }
            if (initTop && typeof initTop == "number") {
                currentwin.css("top", initTop);
            } else {
                currentwin.css("top", 0);
            }
            currentwin.show();
        }
        cwinwidth = currentwin.outerWidth(true);
        cwinheight = currentwin.outerHeight(true);
        currentwin.data("positionleft", positionleft);
        currentwin.data("positiontop", positiontop);
        getBrowserDim();
        moveWin();

        var scrollTimeout;
        $(window).scroll(function() {
            if (!currentwin.is(":visible")) {
                return;
            }
            clearTimeout(scrollTimeout);
            scrollTimeout = setTimeout(function() {
                getBrowserDim();
                moveWin();
            }, 300);
        });
        $(window).resize(function() {
            if (!currentwin.is(":visible")) {
                return;
            }
            getBrowserDim();
            moveWin();
        });
        return currentwin;
    }
}