Quick Contact WordPress Plugin Part 1

qc.php

<?php
/**
 * @package Quick Contact
 * @version 0.1
 */
/*
Plugin Name: Quick Contact
Plugin URI: http://techslides.com/
Description: Quick Contact WordPress Plugin to make an Ajax form submission, store it in the database, and show it in a Admin backend page.
Version: 0.1
Author URI: http://techslides.com/
*/

register_activation_hook(__FILE__,'qc_install');
register_deactivation_hook(__FILE__, 'qc_uninstall' );

global $jal_db_version;
$jal_db_version = "1.0";

function qc_install() {
  global $wpdb;
  global $jal_db_version;

  $table_name = $wpdb->prefix . "quickcontact";

  //http://codex.wordpress.org/Creating_Tables_with_Plugins
  $sql = "CREATE TABLE $table_name (
    id mediumint(9) NOT NULL AUTO_INCREMENT,
    time datetime DEFAULT '0000-00-00 00:00:00' NOT NULL,
    name VARCHAR(120) NOT NULL,
    email VARCHAR(120) DEFAULT '' NOT NULL,
    message text NOT NULL,
    UNIQUE KEY id (id)
  );";

  require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
  dbDelta($sql);

  add_option("jal_db_version", $jal_db_version);

}

function qc_uninstall() {
  global $wpdb;
  global $jal_db_version;

  $table_name = $wpdb->prefix . "quickcontact";

  $wpdb->query("DROP TABLE IF EXISTS $table_name");

  require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
  dbDelta($sql);
}

//http://codex.wordpress.org/Shortcode_API
function function_qc_form(){
  $html = '<div id="qc_form">
    <form id="ContactForm" action="">
      <p>
        <label>Name</label>
        <input id="name" name="name" maxlength="120" type="text" autocomplete="off"/>
      </p>
      <p>
        <label>Email</label>
        <input id="email" name="email" maxlength="120" type="text" autocomplete="off"/>
      </p>
      <p>
        <label>Message</label>
        <textarea id="message" name="message" cols="6" rows="5" autocomplete="off"></textarea>
      </p>
      <p class="submit">
        <input id="send" type="button" value="Submit"/>
      </p>
    </form>
  </div>';
  return $html;
}
add_shortcode( 'qc_form', 'function_qc_form' );

?>