As you know, you can insert some content in any HTML page. You can insert a content by using document.write() or by using the property innerHTML in a DOM object. Also, you can use an existing TAG in order to add/remove elements from its. For example, you can add a Javascript with:

DOM
JavaScript
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function addScripting(s)
{
var scriptNode = document.createElement('script');
document.getElementsByTagName("head")[0].appendChild(scriptNode);
scriptNode.language='javascript';
scriptNode.src=s;
}

Of course, […]

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