Parse Query String Regex

/* No regexp. indexOf only */
window._queryToJSON = function(query)
{
  if(query == null || query.length < 2)
    return {};
    
  var p = 0;   
  
  if(query.charAt(p) == '?')
    ++p;
  if(query.charAt(p) == '&')
    ++p;
    
  var ret = {};
  var _unescape = unescape;

  if(query.charAt(query.length - 1) != '&')
    query += '&';

  var queryLen = query.length - 1;
  
  --p;
  while(++p < queryLen)
  {
    var key = _unescape(query.slice(p, (p = query.indexOf('=', p))));
    var value = _unescape(query.slice(++p, (p = query.indexOf('&', p))));
    
    ret[key] = value;
  }
  
  return ret;
};