JS determines whether the page in the IFrame scrolls to the bottom triggering event

This article mainly introduces JS to determine whether the Web page in the IFRAME scroll to the bottom trigger event, the need for friends can refer to the

There is a need to determine whether the Web page in the IFRAME scroll to the bottom of the trigger event, the Internet to find a lot of information is said under the current page, simply on their own research, found a solution. ClientHeight: The height of this element, taking up the height of the entire space offsetheight: refers to the height of the content of the element scrolltop: You can understand the length of the scroll bar can be scrolled below is the source code code as follows: <iframe src= "~/  Files/3.html "id=" Iframepage "width=" 825 "onload=" func () "></iframe> <script type=" Text/javascript ">  function func () {var IFM = document.getElementById ("Iframepage");  Ifm.height = window.document.body.clientheight-100; <!--in chrome with compatibility issues, FF and IE10 no problem, online said chrome access to the IFRAME in the server environment, do not know what situation--> window.document.getElementById (" Iframepage "). Contentwindow.onscroll = function aaa () {var IFM = document.getElementById (" Iframepage ").  ContentWindow.document.documentElement;  if (ifm.scrolltop = = ifm.scrollheight-ifm.clientheight) {alert ("in the End"); }} </script>