d="usage" class="container pad">
            <h2 class="text-center">Usage</h2>
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                    For SearchGazer to perform eye tracking you need to add the searchgazer.js file as a script in your search engine:
                    <pre><code class="html hljs"> /* WebGazer.js library */ 
&lt;script src="searchgazer.js" type="text/javascript" &gt;</code></pre>
                    <p> 
                        <i>Be aware that when you do