//scroll_view是总容器的id

    console.log("滚动条的垂直位置")
    var scrollTop=$("#scroll_view").scrollTop();
    console.log(scrollTop);
    
    console.log('div的高度');
    var height = $("#scroll_view").height();
    console.log(height);
    
    console.log('容器的总高度');
    var scrollHeight=$("#scroll_view")[0].scrollHeight;
    console.log(scrollHeight);
    
    //如果滚动垂直位置+div的高度大于或者等于容器总高度，就是到底了
    if(scrollTop+height>=scrollHeight){
        console.log("到底了");
    }