if(document.getElementById && document.getElementById('WorldCatWidget')){
    var host = window.location.host;
    document.getElementById('WorldCatWidget').style.width = '300px';
    var iFrameTag = '<iframe id="widgetIframe490809" src="http://worldcat.org/widgets?key=490809&numberOfRecords=8&appearance=listSmall&iFrameView=true&coversPerPage=2&widgetLocal=&ai=OCLC_alicesneary&hostname="';
    iFrameTag += host + ' frameborder="no" height="250px" width="300px" scrolling="no" allowtransparency="true">The WorldCat search widget is loading...</iframe>'; 
    document.getElementById('WorldCatWidget').innerHTML = iFrameTag;
}