复制代码 代码如下:

function reachBottom() {

var scrollTop = 0;

var clientHeight = 0;

var scrollHeight = 0;

if (document.documentElement && document.documentElement.scrollTop) {

scrollTop = document.documentElement.scrollTop;

} else if (document.body) {

scrollTop = document.body.scrollTop;

}

if (document.body.clientHeight && document.documentElement.clientHeight) {

clientHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight: document.documentElement.clientHeight;

} else {

clientHeight = (document.body.clientHeight > document.documentElement.clientHeight) ? document.body.clientHeight: document.documentElement.clientHeight;

}

scrollHeight = Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);

if (scrollTop + clientHeight == scrollHeight) {

return true;

} else {

return false;

}

}