jQuery UI案例 - W3xue在线HTML/CSS/JS运行工具

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 进度条（Progressbar） - 自定义标签</title>
  <link rel="stylesheet" href="/css/jqu1.10.4/jquery-ui.min.css">
  <script src="/js/jqu/jquery.min1.10.2.js"></script>
  <script src="/js/jqu/jquery-ui.min1.10.4.js"></script>
  <link rel="stylesheet" href="jqueryui/style.css">
  <style>
  .ui-progressbar {
    position: relative;
  }
  .progress-label {
    position: absolute;
    left: 50%;
    top: 4px;
    font-weight: bold;
    text-shadow: 1px 1px 0 #fff;
  }
  </style>
  <script>
  $(function() {
    var progressbar = $( "#progressbar" ),
      progressLabel = $( ".progress-label" );
 
    progressbar.progressbar({
      value: false,
      change: function() {
        progressLabel.text( progressbar.progressbar( "value" ) + "%" );
      },
      complete: function() {
        progressLabel.text( "完成！" );
      }
    });
 
    function progress() {
      var val = progressbar.progressbar( "value" ) || 0;
 
      progressbar.progressbar( "value", val + 1 );
 
      if ( val < 99 ) {
        setTimeout( progress, 100 );
      }
    }
 
    setTimeout( progress, 3000 );
  });
  </script>
</head>
<body>
 
<div id="progressbar"><div class="progress-label">加载...</div></div>
 
 
</body>
</html>

AخA
        progressLabel.text( progressbar.progressbar( "value" ) + "%" );
 
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 进度条（Progressbar） - 自定义标签</title>
  <link rel="stylesheet" href="/css/jqu1.10.4/jquery-ui.min.css">
  <script src="/js/jqu/jquery.min1.10.2.js"></script>
  <script src="/js/jqu/jquery-ui.min1.10.4.js"></script>
  <link rel="stylesheet" href="jqueryui/style.css">
  <style>
  .ui-progressbar {
    position: relative;
  }
  .progress-label {
    position: absolute;
    left: 50%;
    top: 4px;
    font-weight: bold;
    text-shadow: 1px 1px 0 #fff;
  }
  </style>
  <script>
  $(function() {
    var progressbar = $( "#progressbar" ),