function init_invitation(){
	var dateObj = new Date();
	var time = dateObj.getTime();
	var url = "/app/member/invitation.php?mode=get_preference&time="+time;
	var xmlhttp = getXmlhttp();	
	xmlhttp.open('GET', url, true);	
	xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
		var str = xmlhttp.responseText;
		set_invitation(str);
    }
    }
	
	xmlhttp.send(null);
}

function set_invitation(flag){
	var i = 1;
	if(flag==1) i = 0;
	document.invitation_pref.statusRadio[i].checked = true;
}

function setInvitationStatus(flag){
  var url = "/app/member/invitation.php?mode=set_preference&flag="+flag;
  var xmlhttp = getXmlhttp();

  xmlhttp.open('POST', url, true);	
   xmlhttp.onreadystatechange = function() {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
      var str = xmlhttp.responseText;
      if(str == "success"){
	if(flag)
	  msg = "受け取る";
	else
	  msg = "受け取らない";
	//alert(msg);
	//alert("flag="+flag);
      }
    }
   }
	
  xmlhttp.send(null);
}