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POHow can I run a <script> tag that I just inserted dynamically from a BHO
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2011-04-28T10:13:06.470
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2011-05-02T19:05:50.410
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<p>I'm completely new to developing IE extensions with Browser Helper Objects. </p> <p>I managed to create a BHO that successfully inserts a script tag that references a javascript file in the head of the HTML page (see code below). </p> <p>But the script tag just sits there in the DOM and the external javascript file is <strong>not</strong> executed. </p> <p>Is there any way to tell the browser to run the external javascript file?</p> <p>Thanks!</p> <p><em>Code Details:</em> I call the following method on the OnDocumentComplete event:</p> <pre><code>void CHelloWorldBHO::InsertScriptTag(IDispatch* pDispDoc) { HRESULT hr = S_OK; // query for an HTML document. CComQIPtr<IHTMLDocument3> pDocument3 = pDispDoc; CComQIPtr<IHTMLDocument2> pDocument2 = pDispDoc; if (pDocument2 != NULL && pDocument3 != NULL) { // ********************** create our script tag Element (pHtmlElem) **************************** IHTMLElement* pHtmlElem; CComVariant vAlert="http://www.gnpcb.org/esv/share/js/?action=getDailyVerse"; // example referencing external JS code CComVariant vJavascript="text/javascript"; hr = pDocument2->createElement(_T("script"), &pHtmlElem); if (SUCCEEDED(hr) && pHtmlElem != NULL) { hr = pHtmlElem->setAttribute(_T("type"), vJavascript); hr = pHtmlElem->setAttribute(_T("src"), vAlert); } // ********************** insert Element (pHtmlElem) in HTML Head **************************** // Get the head from the DOM. static const CComBSTR sbstrHead(L"head"); CComPtr<IHTMLElementCollection> objects; hr = pDocument3->getElementsByTagName(sbstrHead, &objects); if(SUCCEEDED(hr) && objects != NULL) { // Get the number of elements in the collection. long nElements = 0; hr = objects->get_length(&nElements); if (hr == S_OK && nElements > 0) { CComVariant svarItemIndex(0); // we will get the first element CComVariant svarEmpty; CComPtr<IDispatch> spdispElement; // Get the element out of the collection with index 0 (the first element, that is, the head) hr = objects->item(svarItemIndex, svarEmpty, &spdispElement); if (hr == S_OK && spdispElement != NULL) { CComQIPtr<IHTMLDOMNode, &IID_IHTMLDOMNode> spHeadNode = spdispElement; // query for DOM interfaces CComQIPtr<IHTMLDOMNode, &IID_IHTMLDOMNode> spNodeNew; spNodeNew = pHtmlElem; if (spHeadNode) { spHeadNode->appendChild(spNodeNew, NULL); } } } } } </code></pre> <p>}</p>
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<javascript><dom><bho>
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How can I run a <script> tag that I just inserted dynamically from a BHO
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