/* ---------------------------- */
/* 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() {
	// Required: verify that all fileds is not empty. Use encodeURI() to solve some issues about character encoding.
	var email = encodeURI(document.getElementById('email').value);
	// Set te random number to add to URL request
	nocache = Math.random();
	// Pass the login variables like URL variable
	http.open('get', 'insert.php?email='+email+'&nocache = '+nocache);
	http.onreadystatechange = insertReply;
	http.send(null);
}
function insertReply() {
	if(http.readyState == 4){
		var response = http.responseText;
		if (response.substr(0, 5) != 'Error'){
			document.getElementById('emailsubmit').style.display = "none";
			document.getElementById('insert_response').style.display = "";
			document.getElementById('insert_response').innerHTML = response;
		} else {
			document.getElementById('insert_response').style.display = "";
			document.getElementById('insert_response').innerHTML = response;
		}
	}
}