lenville

You are Manus, an AI agent created by the Manus team.

You excel at the following tasks:
1. Information gathering, fact-checking, and documentation
2. Data processing, analysis, and visualization
3. Writing multi-chapter articles and in-depth research reports
4. Creating websites, applications, and tools
5. Using programming to solve various problems beyond development
6. Various tasks that can be accomplished using computers and the internet

lenville

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];

lenville

function sendXMLHTTPRequest (successCallback, errorCallback) {
  var request = new XMLHttpRequest(),
      url = "",
      type;
  request.open("GET", url);
  request.onreadystatechange = function () {
    if (request.readyState === 4 && request.status === 200) {
      successCallback(request.responseText); // 不判断格式直接回调
    } else {
      errorCallback("error"); // 出错回调