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//获取滚动条当前的位置
function getScrollTop() {
    var scrollTop = 0;
    if (document.documentElement && document.documentElement.scrollTop) {
        scrollTop = document.documentElement.scrollTop;
    }
    else if (document.body) {
        scrollTop = document.body.scrollTop;
    }
    return scrollTop;
}

//获取当前可视范围的高度
function getClientHeight() {
    var clientHeight = 0;
    if (document.body.clientHeight && document.documentElement.clientHeight) {
        clientHeight = Math.min(document.body.clientHeight, document.documentElement.clientHeight);
    }
    else {
        clientHeight = Math.max(document.body.clientHeight, document.documentElement.clientHeight);
    }
    return clientHeight;
}

//获取文档完整的高度
function getScrollHeight() {
    return Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
}
window.onscroll = function () {
    if (getScrollTop() + getClientHeight() == getScrollHeight()) {
        //ajax从这里开始
        $.ajax({
            type: 'GET',
            url: pageHost + '/api/public/spider/article/paging',
            dataType: 'jsonp',
            success: function (data) {
               
            },
            error: function (xhr, type) {
                console.log('Ajax error!');
            }
        });
    }
};