外部的 JavaScript
也可以把脚本保存到外部文件中。外部文件通常包含被多个网页使用的代码。
外部 JavaScript 文件的文件扩展名是 .js。
如需使用外部文件，请在 标签的 "src" 属性中设置该 .js 文件：</div><h2 id="GQHzV" style="background-color: transparent;">实例</h2><div style="background-color: #F9F9F9;"><span style="color: olive;"><</span><span style="color: gray;">!</span><span style="color: #00008B;">DOCTYPE</span><span style="color: gray;"> </span><span style="color: #00008B;">html</span><span style="color: olive;">></span><span style="color: gray;"></span><span style="color: olive;"><</span><span style="color: green;">html</span><span style="color: olive;">></span><span style="color: gray;"></span><span style="color: olive;"><</span><span style="color: green;">body</span><span style="color: olive;">></span><span style="color: gray;"></span><span style="color: olive;"><</span><span style="color: green;">script</span><span style="color: gray;"> </span><span style="color: #00008B;">src</span><span style="color: gray;">=</span><span style="color: #8B0000;">"</span><span style="color: #AA1111;">myScript.js</span><span style="color: #8B0000;">"</span><span style="color: olive;">></span><span style="color: olive;"></</span><span style="color: green;">script</span><span style="color: olive;">></span><span style="color: gray;"></span><span style="color: olive;"></</span><span style="color: green;">body</span><span style="color: olive;">></span><span style="color: gray;"></span><span style="color: olive;"></</span><span style="color: green;">html</span><span style="color: olive;">></span></div>
