// get the location
var locationHref = location.href;
var iframeUrl = 'http://cabulous.com/webapp/iframe.php?&width=500&height=300&lat=37.7749295&lng=-122.4194155&company_filter=&show_search=false&default_city=3&lang=&ref=' + locationHref;

var iframeStanza = '<iframe src="' + iframeUrl + '" width="500" height="300" frameborder="0" scrolling="no"></iframe>';

document.write(iframeStanza);