clean_utm.js

// Clean up all those invasive and ugly utm_ parameters, so you can paste a url.
// (will reload the page, be warned)
(function(){
   var qs = window.location.search.slice(1).split('&'),
     newqs = [];
   for (var i = 0; i < qs.length; i++) {
     if (qs[i].slice(0,4)!='utm_') {
       newqs.push(qs[i]);
     }
   }
   window.location.search = (newqs.length ? '?' : '') + newqs.join('&');
})();

// as a bookmarklet:
// javascript:(function(){var qs=window.location.search.slice(1).split('&'),newqs=[];for(var i=0;i<qs.length;i++){if(qs[i].slice(0,4)!='utm_'){newqs.push(qs[i]);}}window.location.search=(newqs.length?'?':'')+newqs.join('&');})();