// ����ͼ�� �ѽ�����
function weixintop(){
this.init();
}
weixintop.prototype = {
constructor: weixintop,
init: function(){
this._initbacktop();
},
_initbacktop: function(){
var $backtop = this.$backtop = $('
');
$('body').append($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", "80px") : $backtop.css("bottom", "-90px");
cleartimeout(timmer);
timmer = settimeout(function() {
cleartimeout(timmer)
},100);
});
}
}
var weixintop = new weixintop();