document.body.innerHTML += '<div id="loader-wrapper"><div id="loader"></div><div class="loader-section section-left"></div><div class="loader-section section-right"></div><div id="load_title">正在加载中，请稍后</div></div>';
window.onload = function() {
    // debugger
    //直接用等于可能覆盖原来的class，所以采用 原内容+空格loaded。就算body原来没有class也不会报错
    document.body.className += " loaded";
    // document.getElementById("header").style.display = "block";
    document.getElementById("q").className += " q1";
    document.getElementById("k").className += " k2";
    document.getElementById("w0").className += " w01";
    document.getElementById("w1").className += " w11";
    document.getElementById("xhw").className += " xhw1";
};