note about iframe

1. iframe id="iframe" , 用 document.getElementById('iframe') 在 IE 下會抓不到，換一個 id 即可。待確認

2. 完全清除 iframe 的 border 單靠 CSS 是不夠的，要設定 iframe frameborder="0"，設定後即可用 CSS control border style, ex: iframe{border: 1px solid #36c}

PPK - Javascript - Iframes

1. The most important rule is to give any iframe you create a name attribute, even if you also use an id.
   
2. alert(frames['inner'].document.body.innerHTML)
   

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