$(function() {
var back = $(".back-to-top");
//设置按钮“返回顶部”
$(window).on('scroll', function() {
if ($(window).scrollTop() > $(window).height())
back.fadeIn();
else
back.fadeOut();
})
$(window).trigger('scroll');
})
$(function() {
var back = $(".back-to-top");
//设置按钮“返回顶部”
$(window).on('scroll', function() {
if ($(window).scrollTop() > $(window).height())
back.fadeIn();
else
back.fadeOut();
})
$(window).trigger('scroll');
})