Edit in place using ajax and contenteditable

edit_item.php

<?php


// quit script if you aren't accessing it with ajax
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) == false){
	die();
}

// include database class
include('database.class.php');

// initialize database class
$db = new database('localhost','user','pass','db');

// send the data to the database
$query = $db->query("UPDATE table SET content='".$_POST['content']."' WHERE id='".$_POST['id']."'";

// if successful, echo true, else false
echo !!$query;

page.html

<section id="1">

    <p contenteditable="true">
        Some text here
    </p>

</section>

script.js

$('p[contenteditable=true]').live('blur',function(){
		
	$.ajax({
		type:'POST',
		url:'edit_item.php',
		data:{
			content: $(this).text(),
			id:      $(this).parent().attr('id')
		},
		success:function(msg){
			if(!msg){
				//console.error('update failure');
				alert('update failure');
			}
		}
	});
		
});