var w = '<iframe id="adFrame" src="http://feeds.epinetwork.com/?ft=contextual';

if(window.keyword !== undefined) w+='&kw='+keyword;
if(window.ad_id !== undefined) w+='&ad_id='+ad_id;
if(window.sid !== undefined) w+='&sid='+sid;

w+='&ref='+escape(window.location);

if(window.ua !== undefined) w+='&ua='+escape(navigator.userAgent);

w += '" frameborder="0" scrolling="no" allowtransparency="true" hspace="0" vspace="0" marginheight="0" marginwidth="0"';

if(window.height !== undefined) w+=' height="'+height+'"';
else w+=' height="90"';

if(window.width !== undefined) w+=' width="'+width+'"';
else w+='" width="768"';

w += '></iframe>';

document.write(w);