锘縱ar IMYUAN;IMYUAN||(IMYUAN={});(function(a){a.fn.extend({returntop:function(){if(this[0]){var b=this.click(function(){a("html, body").animate({scrollTop:0},400)}),c=null;a(window).bind("scroll",function(){var d=a(document).scrollTop(),e=a(window).height();0<d?b.css("bottom","142px"):b.css("bottom","-150px");a.isIE6()&&(b.hide(),clearTimeout(c),c=setTimeout(function(){b.show();clearTimeout(c)},1E3),b.css("top",d+e-125))})}}})})(jQuery);(function(a){a("body")('<a class="close" href="javascript:;"></a>')})(function(){$("#totop").returntop()});