滑动到页面底部继续加载下一页
// 注：监听滚动事件
window.onscroll = function () {
// 文档高度
var scrollTop = 0, bodyScrollTop = 0, documentScrollTop = 0
if (document.body) {
bodyScrollTop = document.body.scrollTop
}
if (document.documentElement) {
documentScrollTop = document.documentElement.scrollTop
}
scrollTop = (bodyScrollTop - documentScrollTop > 0) ? bodyScrollTop : documentScrollTop
// 可视窗口高度
var windowHeight = 0
if (document.compatMode == 'CSS1Compat') {
windowHeight = document.documentElement.clientHeight
} else {
windowHeight = document.body.clientHeight
}
// 滚动条滚动高度
var scrollHeight = 0, bodyScrollHeight = 0, documentScrollHeight = 0
if (document.body) {
bodyScrollHeight = document.body.scrollHeight
}
if (document.documentElement) {
documentScrollHeight = document.documentElement.scrollHeight
}
scrollHeight = (bodyScrollHeight - documentScrollHeight > 0) ? bodyScrollHeight : documentScrollHeight
// 判断是否已经到底部
if(scrollTop + windowHeight >= scrollHeight * 8 / 9){
//当滚动条到底时,这里是触发内容
//异步请求数据,局部刷新dom
// ajax_function()
// alert('bottom')
loadNextTopic()
}
}