/// <summary>
/// 返回顶部
/// </summary>
if (false) {
    var img_path = "/misc/images/2012120310340211.png";
    (function ($) {
        var goToTopTime;
        $.fn.goToTop = function (options) {
            var opts = $.extend({}, $.fn.goToTop.def, options);
            var $window = $(window);
            $body = (window.opera) ? (document.compatMode == "CSS1Compat" ? $('html') : $('body')) : $('html,body'); // opera fix
            $(this).hide();
            var $this = $(this);
            clearTimeout(goToTopTime);
            goToTopTime = setTimeout(function () {
                var controlLeft;
                if ($window.width() > opts.pageHeightJg * 2 + opts.pageWidth) {
                    controlLeft = ($window.width() - opts.pageWidth) / 2 + opts.pageWidth + opts.pageWidthJg;
                } else {
                    controlLeft = $window.width() - opts.pageWidthJg - $this.width();
                }
                var cssfixedsupport = $.browser.msie && parseFloat($.browser.version) < 7; //判断是否ie6
                var controlTop = $window.height() - $this.height() - opts.pageHeightJg;
                controlTop = cssfixedsupport ? $window.scrollTop() + controlTop : controlTop;
                var shouldvisible = ($window.scrollTop() >= opts.startline) ? true : false;

                if (shouldvisible) {
                    $this.stop().show();
                } else {
                    $this.stop().hide();
                }

                $this.css({
                    position: cssfixedsupport ? 'absolute' : 'fixed',
                    top: controlTop,
                    left: controlLeft
                });
            }, 30);

            $(this).click(function (event) {
                $body.stop().animate({ scrollTop: $(opts.targetObg).offset().top }, opts.duration);
                $(this).blur();
                event.preventDefault();
                event.stopPropagation();
            });
        };

        $.fn.goToTop.def = {
            pageWidth: $(window).width(), //页面宽度
            pageWidthJg: 5, //按钮和页面的间隔距离
            pageHeightJg: 10, //按钮和页面底部的间隔距离
            startline: 500, //出现回到顶部按钮的滚动条scrollTop距离
            duration: 200, //回到顶部的速度时间
            targetObg: "body"//目标位置
        };
    })(jQuery);
    $(function () {
        $('<a href="javascript:;" class="backToTop"><img style="cursor:pointer" src="' + img_path + '"/></a>').appendTo("body");
    });
    //调用返回顶部
    $(function () {
        $(".backToTop").goToTop({});
        $(window).bind('scroll resize', function () {
            $(".backToTop").goToTop({});
        });
    });
}