They've changed site a bit.
Here is new script, just put it into bookmarks
Code:
javascript:(function(){window.prompt("Copy this :)",'rtmpdump -v -r "rtmp://178.33.53.85/liveorigin/_definst_/'+transmission.streamID+'" -s "http://showup.tv/" -o "'+document.location.pathname.replace(/\//g,"")+"_"+Number(new Date/1e3).toFixed(0)+'.flv"')})()