function getParams() {
  var idx = window.location.href.indexOf('?');
  var params = new Array();
  if (idx != -1) {
    var pairs = window.location.href.substring(idx+1,window.location.href.length).split('&');
    for (var i=0; i<pairs.length; i++) {
      nameVal = pairs[i].split('=');
      params[nameVal[0]] = nameVal[1];
    }
  }
  return params;
}
params = getParams();