function add_user() {
    var user = document.getElementById("user").value;
    var pass = document.getElementById("pass").value;

    if (user.length == 0) {
        alert("Please enter a user name");
        return;
    }
    if (pass.length == 0) {
        alert("Please enter a password");
        return;
    }

    document.getElementById("user_admin").action = "user_create.php";
    document.getElementById("user_admin").submit();
} 

function search_user() {
    var user = document.getElementById("user1").value;

    if (user.length == 0) {
        alert("Please select a user");
        return;
    }

    document.getElementById("user_admin").action = "user_search.php";
    document.getElementById("user_admin").submit();
}

function save_user() {
    document.getElementById("user_update").action = "user_update.php";
    document.getElementById("user_update").submit();
}

function logon() {
    var user = document.getElementById("user").value;
    var pass = document.getElementById("pass").value;

    if (user.length == 0) {
        alert("Please enter your email address");
        return;
    }
    if (pass.length == 0) {
        alert("Please enter a password");
        return;
    }

    document.getElementById("logon").submit();
}

function areaselect() {
    document.getElementById("areaselect").submit();
}

function delete_user() {
    var user = document.getElementById("user1").value;

    if (user.length == 0) {
        alert("Please select a user");
        return;
    }

    document.getElementById("user_admin").action = "user_delete.php";
    document.getElementById("user_admin").submit();
}

function logout() {
    document.getElementById("logoutform").submit();
}

function choose() {
    document.getElementById("intro").style.display = "none";
    document.getElementById("chooseintro").style.display = "block";
}