需要JavaScript OOP和setInterval幫助

我正在編寫一個網頁，每4秒會發送一條不同的消息。我已經構建了一個自定義對象，我打算從中提取信息以創建要顯示的字符串。我使用的函數類似於Math.random，它叫做'rand'，它可以讓我隨機訪問對象。我已經設置了4秒的時間間隔。我可以得到要顯示的字符串，但在此之後，網頁會繼續加載和加載，並且開始嚴重滯後以致不得不退出。我使用的代碼如下所示。請幫忙！需要JavaScript OOP和setInterval幫助

var name = "Barack Obama"; 

    var Actions = { 

    "ActionList" : [ 

     { "action" : "watches a 30 minute TV show", 
      "time" : 30, 
      "time_measure" : "minute", 
      "assuming" : "assuming he sat through the commercials too" 
     }, 

     { 
      "action" : "makes some pizza rolls", 
      "time" : 9, 
      "time_measure" : "minute", 
      "assuming" : "he only made one plateful" 
     }, 

     { 
      "action" : "takes a 2 hour nap", 
      "time" : 2, 
      "time_measure" : "hour", 
      "assuming" : "assuming he's a heavy sleeper" 
     }, 

     { 
      "action" : "1000 jumping jacks", 
      "time" : 1, 
      "time_measure" : "hour", 
      "assuming" : "he doesn't take a break, or slow down" 
     } 
    ] 

    }; 

    function rand(min, max) { 
    return Math.floor(Math.random() * (max - min + 1)) + min; 
    } 
    function run() { 

    /** 
    * RANDOMLY SELECT OBJECTS 
    ***/ 
    var r = rand(0, 3); 

    var x = Actions.ActionList[r]["action"]; 

    document.write(x); 

    } 



    setInterval(run, 4000);

來源

2012-10-12 JaPerk14