jquery post

<?php
session_start();
if(isset($_SESSION['username'])) {
include('conn.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<meta name="viewport" content="width=device-width,user-scalable=false;"/>
<meta name="description" content=""/>
<meta name="keywords" content=""/>
<title></title>
<script type="text/javascript" src="jquery.js"></script>
<link rel="stylesheet" type="text/css" href="style.css"/>
<script>
$(document).ready(function() {
	$('#coord_click').click(function() {
	provjera();
	});
});
function provjera() {
	var adresa=$('#adresa').val();
	var mjesto=$('#mjesto').val();
   var puna_adresa=adresa+" "+mjesto;
	$.post("koord.php",{puna_adresa:puna_adresa},
		function(result) {
		$('#coords').val(result);
		});
}
</script>
 </head>
<body>
<div id="header"><div id="logo"><br/></div>
<ul>
<li><a href="index.php"></a></li>
<li><a href="onama.php"></a></li>
<li><a href="applic.php"></a></li>
</ul>
<div id="jezik"><a href="prijava.php"><img src="ikone/cro.jpg" alt=""/></a><a href="prijava_eng.php"><img src="ikone/engl.jpg" alt=""/></a></div>
</div>
<div id="kontejner"><div id="gornja">
<?php
for ($i=0; $i<=8; $i++)
{
echo "Available&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
}
?>
</div>
<div id="prijava_m">
<i>Dodavanje</i><br/><br/><hr style="width:380px"/>
<form name="dodaj" action="dodaj.php" method="post"/>
<center>
<table>
<tr><td>Naziv<br/><input type="text" name="naziv"/></td><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Adresa<br/><input type="text" name="adresa" id="adresa"/></td></tr>
<tr><td>Mjesto<br/><input type="text" name="mjesto" id="mjesto"/></td><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>Država<br/><input type="text" name="drzava" id="drzava"/></td></tr>
<tr><td>Tel/Mob<br/><input type="text" name="tel"/></td><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td>E-mail<br/><input type="text" name="mail"/></td></tr>
</table>
Slobodno <span style="font-size:10px"></span>&nbsp;&nbsp;<input type="checkbox" name="slobodno"/>&nbsp;&nbsp;do&nbsp;&nbsp;<input type="text" name="slobodno_do" value="dd.mm.yyyy" size="10" onclick="this.select();"/>
<table>
<tr><td>Koordinate<br/><input type="text" name="coords" id="coords"/></td><td>&nbsp;&nbsp;&nbsp;&nbsp;</td><td><br/><span><img src="ikone/refresh.png" id="coord_click" height="32px" width="32px" title="Klikni za koordinate"/></span></td></tr>
</table>
<span style="font-size:12px">...ili ih upiši ručno (decimalni format).</span>
</center>
</form>
</div>
<div id="donja">
<?php
for ($i=0; $i<=8; $i++)
{
echo "Reserved&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
}
?>
</div></div>
<div id="footer"><center>Test</center></div>
</body>
</html>
<?php
} else {
echo "Niste prijavljeni!!!";
}
?>