javascript:
var afid='AmazonアソシエイトID';
var u=document.location.href;
javascript:
var ai=u.indexOf('ASIN');var asin=u.substring(ai+5,ai+15);
var link='http://amazon.co.jp/o/ASIN/'+asin+'/'+afid+'/ref=nosim;
var x=prompt('Tiny URL',link);