Parsing the query string given a parameter. Eg. given http://www.domain.com.au?aaa=vvv SA.URL().getQueryValue("aaa") returns "vvv"

Url query string manipulation

/*
* @author Sebastiano Armeli-Battana (@sebarmeli)
* @version 0.2 
*/
/*globals window, SA */
if (!window.SA) {window.SA = {}; } 
SA.URL = (function() {
    var qstring = window.location.search;
    return {
        getQueryValue : function(param) {
      	  var qstringArray = qstring && qstring.substring(1).split("&"),
      	    i = 0,
      	    len = qstringArray.length;
          for (; i < len; i++) {
	    var token = qstringArray[i],
		eqIndex = token.indexOf("="),
		firstPart = token && token.substring(0, eqIndex);
	    if (firstPart === param ) {
		return token.substring(eqIndex + 1, token.length);
	    }
          }
        }
    };
}());