able to convert query string like ?q=abc&g[]=1&g[]=2 into a javascript object (params) which has 2 params q & g. The params.q will be 'abc' string while params.g will be an array containing the value 1, 2

convert_query_string_to_assoc_array.js

RegExp.quote = function(str) {
    return (str+'').replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
}

function getSearchParameters() {
      var prmstr = window.location.search.substr(1);
      return prmstr != null && prmstr != "" ? transformToAssocArray(prmstr) : {};
}

function transformToAssocArray( prmstr ) {
    var params = {};
    var newParam = tmparr[0];
    var pattern = '[]';
    var arrayRegExp = new RegExp(RegExp.quote(pattern), 'g');
    if (tmparr[0].match(arrayRegExp)) {
      newParam = tmparr[0].replace(arrayRegExp, "");
      if (typeof params[newParam] == 'undefined') {
        params[newParam] = new Array();
      }
      params[newParam].push(tmparr[1]);
    } else {
      params[tmparr[0]] = tmparr[1];
    }
}

var params = getSearchParameters();