页面抵达底部时的自动刷新

页面到达底部时的自动刷新

window.onscroll=function(){var a = document.documentElement.scrollTop==0? document.body.clientHeight : document.documentElement.clientHeight;var b = document.documentElement.scrollTop==0? document.body.scrollTop : document.documentElement.scrollTop;var c = document.documentElement.scrollTop==0? document.body.scrollHeight : document.documentElement.scrollHeight;if(a+b==c){alert("new message");}}