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                <h1 onclick = "createIrisDiv()">DOM 太簡單,動不 DOM 我!</h1>

<div id="irisDiv">
JS 必拜觀念





function createIrisDiv() {      // 建立函式,來包裝以下一整套的功能
  var DOM = document.createElement("p");   // 創造一個 p 元素丟到變數 DOM 中
  var text = document.createTextNode("DOM DOM DOM!"); // 創造一段文字丟到變數 text 中
  DOM.appendChild(text);  // 把該段 text 附加上 P 元素
  if (document.getElementById("irisDiv")  !== null) {
  document.getElementById("irisDiv").appendChild(DOM);  // 最後,把已經附加完成的 text 再附加上 id 擁有 “irisDiv” 的 <div> 上