function getParamValue(paramStr, offset) {
  var endstr =  paramStr.indexOf('&', offset);
  if( endstr == -1 ) { endstr =  paramStr.length; }
  return unescape(  paramStr.substring( offset, endstr ) );
}

function GetParam(paramStr, name) {
  var arg = name + '=';
  var alen = arg.length;
  var clen = paramStr.length;
  var i = 0;
  while ( i < clen ) {
    var j = i + alen;
    if (paramStr.substring(i,j) == arg) {
      return getParamValue(paramStr, j);
    }
    i = paramStr.indexOf('&amp;', i);
    if (i == 0 || i== -1 ) break;
    i += 5;
  }
  return null;
}



function toggleElementOnLoad(query_str) {

  var topic = GetParam(query_str, 'topic' );
  if(topic)
  {
    toggleElement('level_' + topic + '_01');
  }
}