function setCookie(name, value) {
  var curCookie = name + "=" + escape(value);
  document.cookie = curCookie;
}
function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}
function selectrequest(){
  var a=document.getElementById("form_a");
  var b=document.getElementById("form_b");
  if (document.getElementById("form_request").value=="b"){
    setCookie("mform", "b");
    a.style.display="none";
    b.style.display="block";
  }else{
    setCookie("mform", "a");
    a.style.display="block";
    b.style.display="none";
  }
}