attributes = new Array();
function getParams() {
  if (urlquery.length>1) {
    urlterms=unescape(urlquery[1]).split("&");
    for (a in urlterms) {
        term=urlterms[a].split("=");
        attributes[term[0]]=term[1];
    }
  }
}
function getParameter(val) {
  if (!attributes[val]) return null;
  else return attributes[val];
}