Meetups/August HZAU-China/backtop.js
From 2014.igem.org
//javascript Document function SuCaiJiaYuan(){ this.init(); }
SuCaiJiaYuan.prototype = { constructor: SuCaiJiaYuan, init: function(){ this._initBackTop(); }, _initBackTop: function(){
var $backTop = this.$backTop = $(''+
');
'<a class="cweixin cbbtn"">'+
''+'</a>'+ '<a class="gotop cbbtn">'+ ''+ '</a>'+
'$('body').append($backTop);
$backTop.click(function(){ $("html, body").animate({ scrollTop: 0 }, 120); });
var timmer = null; $(window).bind("scroll",function() {
var d = $(document).scrollTop(), e = $(window).height(); 0 < d ? $backTop.css("bottom", "10px") : $backTop.css("bottom", "-90px");
clearTimeout(timmer); timmer = setTimeout(function() {
clearTimeout(timmer) },100);
}); }
} var SuCaiJiaYuan = new SuCaiJiaYuan();