note on how to make clipped iframe

iframe.html

<!-- <div id="content">
    <div style="height:800px;">
        <iframe id="optomaFeed" src="http://www.optomausa.com/company/press-releases/" scrolling="auto"
            frameborder="0" height="100%" width="100%"></iframe>
    </div>
</div>  -->

<div id="content">
    <div style="height:800px;">
        <iframe id="optomaFeed" src="http://www.optomausa.com/company/press-releases/" scrolling="no"
            frameborder="0" height="100%" width="100%" style="position:absolute; clip:rect(190px,1100px,800px,250px);
            top:-160px; left:-160px;"></iframe>
    </div>
</div>