function showLogocredit() {
 $("#logocredit").css("visibility","visible");
}

function hideLogocredit() {
 $("#logocredit").css("visibility","hidden");
}

function showAbout() {
 $("#about").css("visibility","visible");
}

function hideAbout() {
 $("#about").css("visibility","hidden");
}

function hideUsermenu() {
 $("#usermenu").css("visibility","hidden");
}

function showUsermenu() {
 $("#usermenu").css("visibility","visible");
}

function logout() {
 window.location="logout.php";
}

function showMemberinfo() {
 $("#inviteinfo").css("visibility","hidden");
 $("#userinfo").css("visibility","hidden");
 $("#memberinfo").css("visibility","visible");
}

function showInvite() {
 $("#inviteinfo").css("visibility","visible");
 $("#userinfo").css("visibility","hidden");
 $("#memberinfo").css("visibility","hidden");
}

function showUserinfo() {
 $("#inviteinfo").css("visibility","hidden");
 $("#userinfo").css("visibility","visible");
 $("#memberinfo").css("visibility","hidden");
}

function myGet(myUrl) {
     var result = null;
     $.ajax({
        url: myUrl,
        type: 'get',
        dataType: 'html',
        async: false,
        success: function(data) {
            result = data;
        } 
     });
     return result;
}

function showAdmin() {
 $("#admin").css("visibility","hidden");
 $("#admin").html(myGet("showusers.php"));
 $("#admin").css("visibility","visible");
}

function delUser(uid) {
 yn = confirm("Users should be deactivated, not deleted. Are you sure?");
 if (!yn)
  abort();
 url="deluser.php?u=" + uid;
 result = myGet(url);
 if (result[0] == "O")
  alert("user deleted");
 else 
  alert("something went wrong (" + uid + "), try again: " + result);
 showAdmin();
}

function editUser(uid) {
  alert("use MySQL, Luke");
}

function deactivateUser(uid) {
  alert("use MySQL, Luke");
}