generate object from querystring via src (stolen from http://feather.elektrum.org/book/src.html)

qs2obj.js

// get qs from src path
// http://feather.elektrum.org/book/src.html
var scripts = document.getElementsByTagName('script');
var thisIdx = scripts.length - 1;
var thisScript = scripts[thisIdx];
var qs = {};
var str = thisScript.src
          .replace(/^[^\?]+\??/, '') // strip out address
          .split(/\&/) // split on ampersands
          .map(function(it){ // parse thru each key=val, split on equal sign and assign to qs object
            var s = it.split(/\=/); 
            qs[s[0]] = decodeURIComponent(s[1]); 
          });
          
// qs is now the object to use:
// {
//   abc: "123",
//   xyz: "789"
// }