var scriptURL = 'http://www.flickr.com/badge_code_v2.gne?count=1&display=random&size=t&layout=h&source=all_tag&tag=';
scriptURL = scriptURL + tagCall;

var scriptText = '';
scriptText = '\<script type=\"text/javascript\" src=\"' + scriptURL + '\"\>\</script\>';

document.write( scriptText);