HTML ANCHOR TAG - ID ATTRIBUTE
Run 
<!Doctype html>
<html>
    <head>
        <title>
            Creating a hyperlink with id attribute
        </title>
    </head>
    <body>
        <h1 id="top">This is top</h1>
        <p><a href="#middle">Go to Middle</a></p>
        <p><a href="#bottom">Go to bottom</a></p>
        
        <!--  Some content -->
        <br/><br/><br/><br/><br/><br/><br/><br/>
        <br/><br/><br/><br/><br/><br/><br/><br/>
        <br/><br/><br/><br/><br/><br/><br/><br/>
        
        <h1 id="middle">This is Middle</h1>
        <p><a href="#top">Go to top</a></p>
        <p><a href="#bottom">Go to bottom</a></p>
        
        <!--  Some content -->
        <br/><br/><br/><br/><br/><br/><br/><br/>
        <br/><br/><br/><br/><br/><br/><br/><br/>
        <br/><br/><br/><br/><br/><br/><br/><br/>

        <p><a href="#middle">Go to Middle</a></p>
        <p><a href="#top">Go to top</a></p>
        <h1 id="bottom">This is bottom</h1>
        
    </body>
</html>