/* ---------------------------- */
/* XMLHTTPRequest Enable */
/* ---------------------------- */
function createObject() {
var request_type;
var browser = navigator.appName;
if(browser == "Microsoft Internet Explorer"){
request_type = new ActiveXObject("Microsoft.XMLHTTP");
}else{
request_type = new XMLHttpRequest();
}
return request_type;
}

var http = createObject();
/* -------------------------- */
/* INSERT */
/* -------------------------- */
/* Required: var nocache is a random number to add to request. This value solve an Internet Explorer cache issue */
var nocache = 0;
function insert() {
// Optional: Show a waiting message in the layer with ID login_response
document.getElementById('insert_response').innerHTML = "Uploading review..."
// Required: verify that all fileds is not empty. Use encodeURI() to solve some issues about character encoding.
var isbn= encodeURI(document.getElementById('isbn').value);
var comment = encodeURI(document.getElementById('comment').value);
// Set te random number to add to URL request
nocache = Math.random();
// Pass the login variables like URL variable
http.open('get', 'rating.php?isbn='+isbn+'&comment='+comment+'&nocache = '+nocache);
http.onreadystatechange = insertReply;
http.send(null);
}

function mycarousel_itemLoadCallback(carousel, state)
{};

function mycarousel_itemAddCallback(carousel, first, last, xml)
{};

function insertReply() {
if(http.readyState == 4){ 
var response = http.responseText;

document.getElementById('insert_response').innerHTML = 'Review Submitted'+response;
}
}