# 1.9.2.IFrame contentWindow property ## 1.Introduction * contentWindow可以回傳由IFrame產生的window object * 藉由window object, 可以取得document object以及其任何一個element ## 2.Usage * Example from [w3schools.com](https://www.w3schools.com/jsref/prop_frame_contentwindow.asp) ```

Click the button to change the background color of the document contained in the iframe.

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