(function ($) {
    $.fn.floatad = function (options) {
        var defaults = {
            imgsrc: "#", //漂浮图片路径
            url: "#", //图片点击跳转页
            openstyle: 1, //跳转页打开方式 1为新页面打开  0为当前页打开
            speed: 10, //漂浮速度 单位毫秒
            title: "",
            width: 0,
            height: 0
        };
        var options = $.extend(defaults, options);
        var _target = options.openstyle == 1 ? "target='_blank'" : '';
        var _title = options.title == "" ? "" : ' alt="' + options.title + '" title="' + options.title + '" ';
        var html = "<div id='float_ad' style='position:fixed;left:0px;top:0px;z-index:1000000;cleat:both;'>";
        html += "  <a href='" + options.url + "' " + _target + "><img width='" + options.width + "px' height='" + options.height + "px' src='" + options.imgsrc + "' " + _title + " border='0' class='float_ad_img'/></a> ";
        html += "<a href='javascript:;' id='close_float_ad'><div style='font-size: 12px; text-align: right; text-decoration: none; color: black;width:" + options.width + "px;'>关闭</div></a>";
        html += "</div>";

        $('body').append(html);

        function init() {
            var x = 0, y = 0
            var xin = true, yin = true
            var step = 1
            var delay = 10
            var obj = $("#float_ad")
            obj.find('img.float_ad_img').load(function () {
                var float = function () {
                    var l = t = 0;
                    var ow = obj.width(); //当前广告的宽
                    var oh = obj.height(); //高
                    var dw = $(window).width(); //浏览器窗口的宽
                    var dh = $(window).height();

                    x = x + step * (xin ? 1 : -1);
                    if (x < l) {
                        xin = true; x = l
                    }
                    if (x > dw - ow - 1) {//-1为了ie
                        xin = false; x = dw - ow - 1
                    }

                    y = y + step * (yin ? 1 : -1);
                    if (y > dh - oh - 1) {

                        yin = false; y = dh - oh - 1;
                    }
                    if (y < t) {
                        yin = true; y = t
                    }

                    var left = x;
                    var top = y;

                    obj.css({ 'top': top, 'left': left });
                }
                var itl = setinterval(float, options.speed);
                $('#float_ad').mouseover(function () { clearinterval(itl) });
                $('#float_ad').mouseout(function () { itl = setinterval(float, options.speed) })
            });
            // 点击关闭
            $('#close_float_ad').click(function () {
                $('#float_ad').hide();
            });
        }

        init();

    }; //floatad

})(jquery);