$(document).ready(function(){  $('.BTT').click(function(){$('#pageTop').ScrollTo(800);return false});});jQuery.getPos = function (e){var l = 0;var t  = 0;var w = jQuery.intval(jQuery.css(e,'width'));var h = jQuery.intval(jQuery.css(e,'height'));var wb = e.offsetWidth;var hb = e.offsetHeight;while (e.offsetParent){l += e.offsetLeft + (e.currentStyle?jQuery.intval(e.currentStyle.borderLeftWidth):0);t += e.offsetTop  + (e.currentStyle?jQuery.intval(e.currentStyle.borderTopWidth):0);e = e.offsetParent;}l += e.offsetLeft + (e.currentStyle?jQuery.intval(e.currentStyle.borderLeftWidth):0);t  += e.offsetTop  + (e.currentStyle?jQuery.intval(e.currentStyle.borderTopWidth):0);return {x:l, y:t, w:w, h:h, wb:wb, hb:hb};};jQuery.getClient = function(e){if (e) {w = e.clientWidth;h = e.clientHeight;}else{w = (window.innerWidth) ? window.innerWidth : (document.documentElement && document.documentElement.clientWidth) ? document.documentElement.clientWidth : document.body.offsetWidth;h = (window.innerHeight) ? window.innerHeight : (document.documentElement && document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.body.offsetHeight;}return {w:w,h:h};};jQuery.getScroll = function (e){if (e) {t = e.scrollTop;l = e.scrollLeft;w = e.scrollWidth;h = e.scrollHeight;}else{if (document.documentElement && document.documentElement.scrollTop) {t = document.documentElement.scrollTop;l = document.documentElement.scrollLeft;w = document.documentElement.scrollWidth;h = document.documentElement.scrollHeight;} else if (document.body) {t = document.body.scrollTop;l = document.body.scrollLeft;w = document.body.scrollWidth;h = document.body.scrollHeight;}}return { t: t, l: l, w: w, h: h };};jQuery.intval = function (v){v = parseInt(v);return isNaN(v) ? 0 : v;};jQuery.fn.ScrollTo = function(s) {o = jQuery.speed(s);return this.each(function(){new jQuery.fx.ScrollTo(this, o);});};jQuery.fx.ScrollTo = function (e, o){var z = this;z.o = o;z.e = e;z.p = jQuery.getPos(e);z.s = jQuery.getScroll();z.clear = function(){clearInterval(z.timer);z.timer=null};z.t=(new Date).getTime();z.step = function(){var t = (new Date).getTime();var p = (t - z.t) / z.o.duration;if (t >= z.o.duration+z.t) {z.clear();setTimeout(function(){z.scroll(z.p.y, z.p.x)},13);} else {st = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.p.y-z.s.t) + z.s.t;sl = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.p.x-z.s.l) + z.s.l;z.scroll(st, sl);}};z.scroll = function (t, l){window.scrollTo(l, t)};z.timer=setInterval(function(){z.step();},13);};