网页资源加载动画

<script>
var _LoadingHtml = "<div id='loadingDiv'><div class='loading'><img src='static/img/loading2.gif' class='img-responsive'></div><p>拼命加载，请稍等...</p></div>";
document.write(_LoadingHtml);
document.onreadystatechange = completeLoading;
//加载状态为complete时移除loading效果
function completeLoading() {
if (document.readyState == "complete") {
var loadingMask = document.getElementById('loadingDiv');
loadingMask.parentNode.removeChild(loadingMask);
}
}
</script>