Notifications Bar on home page only

Question

Is it possible to create an "Alert" button that can be turned on and off thru wp-admin. Of course the "Alert" button im asking for is to be published at the main page, but can only be turned on when its needed.

Im using wordpress with jqueryMobile for your information.

EDIT:

Its pretty hard to explain this. But i found this plugin and it does what im after. Except this plugin show the notification on everypage - even wp-admin.

To the question:

Is it possible to create a notification/menubar that can be tunerd on/off from wp-admin. The idea behind this is to show important "news" whenever.?

Whats the best solution?

Answer 1

Using the very example from the Codex in the Settings API section. Put it in the theme's functions.php:

add_action('admin_init', 'eg_settings_api_init');

function eg_settings_api_init() {
    add_settings_section(
        'eg_setting_section',
        'Example settings section in reading',
        'eg_setting_section_callback_function',
        'reading'
    );

    add_settings_field(
        'eg_setting_name',
        'Example setting Name',
        'eg_setting_callback_function',
        'reading',
        'eg_setting_section'
    );

    register_setting('reading','eg_setting_name');
}

function eg_setting_section_callback_function() {
    echo '<p>Intro text for our settings section</p>';
}

function eg_setting_callback_function() {
    echo '<input name="eg_setting_name" 
        id="gv_thumbnails_insert_into_excerpt" 
        type="checkbox" 
        value="1" 
        class="code" ' 
        . checked( 1, get_option('eg_setting_name'), false ) 
        . ' />Explanation text';
}

This creates a checkbox in Settings > Reading:

And in the theme header.php file, it can be used to render a big red warning banner:

<?php 
    if( get_option('eg_setting_name') ) {
        echo '<h1 style="background-color: #fcc;width:100%;height:3em;line-height:3em;text-align:center;top:40px;position:fixed">
            Warning!
            </h1>';
    }
?>