Hi, I'm starting to get mad with these codes.

The thing is, I've done a code that adds data into a mysql database, but I don't want to reload the page.

This is my HTML page (there's extra code but only for decorating):
---------------------------
<script src="saving.js"></script>
...
<form method="POST">
<table width="350">
<tr><td><b>First Name:</b></td><td><input type="text" name="fname" /></td></tr>
<tr><td><b>Last Name:</b></td><td><input type="text" name="flast" /></td></tr>
<tr><td><b>Phone Number:</b></td><td><input type="text" name="fphone" /></td></tr>
<tr><td><b>Address:</b></td><td><input type="text" name="faddr" /></td></tr>
<table>
<br>
<br>
<input type="Submit" value="Submit" onClick="User(fname,flast,fphone,faddr);"/>
</form>
<p>
<div id="txtHint"><b>Info here.</b></div>
</p>
--------------------------

This is my JS code:
--------------------------
var xmlHttp;

function User(str1,str2,str3,str4)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request");
return;
}
var url="insert.php";
url=url+"?fname="+str1+"&flast="+str2+"&fphone="+str3+"&faddr="+str4;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
//Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
-----------------------------------

This is my PHP code:
-----------------------------------
<?php

$fname = $_GET["fname"];
$flast = $_GET["flast"];
$fphone = $_GET["fphone"];
$faddr = $_GET["faddr"];

$dbhost = 'localhost:3306';
$dbuser = '***********';
$dbpass = '***********';

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to MySQL!');
$dbname = 'records';

mysql_select_db($dbname);

$query = "
INSERT INTO registry (name, last, phone, address)
VALUES ('$fname', '$flast', '$fphone', '$faddr')
";

mysql_query($query) or die("Error, insert query failed");
mysql_close($conn);

echo "Data added succesfully!";

?>
---------------------------------------

The deal is simple... is not working!

I just want to add data to mysql with AJAX so the browser doesnt reload the page.

Using MULTIPLE!!!!! PARAMETERS!!!!!, not just one as seen on w3schools example.

Thanks in Advance!