if(document.getElementById && document.getElementById('WorldCatSearchWidget')){
    var host = window.location.host;
    document.getElementById('WorldCatSearchWidget').style.width = '300px';
    var iFrameTag = '<iframe id="widgetIframelibrarians" src="http://worldcat.org/widgets?key=librarians&numberOfRecords=8&appearance=smallDefault&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('WorldCatSearchWidget').innerHTML = iFrameTag;
}