滑动到底部自动刷新

bottomRefresh.js

var wrap=document.getElementById('page');
var contentHeight=wrap.offsetHeight;
var yOffset=window.pageYOffset;
var y = yOffset + window.innerHeight;
function autoRefesh(){
	wrap=document.getElementById('page');
	contentHeight=wrap.offsetHeight;
	yOffset=window.pageYOffset;
	y = yOffset + window.innerHeight;
	console.log('y是'+y);
	if((y+100) >= contentHeight){//执行 和加载新信息
		console.log('Pull new data');
		dataLoad.get('a.json');
	}
}
window.onscroll=autoRefesh;