--- a/include/common-template.inc.php
+++ b/include/common-template.inc.php
@@ -34,6 +34,8 @@
 <meta name="viewport" content="width=device-width, initial-scale=1"> 	
 <title>' . $pageTitle . '</title>
         <meta name="google-site-verification" content="-53T5Qn4TB_de1NyfR_ZZkEVdUNcNFSaYKSFkWKx-sY" />
+<link rel="dns-prefetch" href="//code.jquery.com">
+<link rel="dns-prefetch" href="//ajax.googleapis.com">
 	<link rel="stylesheet"  href="' . $labsPath . 'css/jquery-ui-1.8.12.custom.css" />';
 	if (isDebugServer()) {
 		$jqmcss = $labsPath . 'css/jquery.mobile-1.0b1.css';
@@ -41,9 +43,9 @@
 		$jqmjs = $labsPath . 'js/jquery.mobile-1.0b1.js';
 	}
 	else {
-		$jqmcss = "http://code.jquery.com/mobile/1.0b1/jquery.mobile-1.0b1.min.css";
-		$jqjs = "http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js";
-		$jqmjs = "http://code.jquery.com/mobile/1.0b1/jquery.mobile-1.0b1.min.js";
+		$jqmcss = "//code.jquery.com/mobile/1.0b1/jquery.mobile-1.0b1.min.css";
+		$jqjs = "//ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js";
+		$jqmjs = "//code.jquery.com/mobile/1.0b1/jquery.mobile-1.0b1.min.js";
 	}
 	echo '<link rel="stylesheet"  href="' . $jqmcss . '" />
 	<script src="'.$jqjs.'"></script>

--- a/labs/busstopdensity.tile.php
+++ b/labs/busstopdensity.tile.php
@@ -15,8 +15,8 @@
 	set_time_limit(120);//2mn
 	ini_set('memory_limit', '256M');
 error_reporting(E_ALL ^ E_DEPRECATED);
-	require_once ('lib/GoogleMapUtility.php');
-	require_once ('lib/HeatMap.php');
+	require_once ($labsPath . 'lib/GoogleMapUtility.php');
+	require_once ($labsPath . 'lib/HeatMap.php');
 
 	//Root folder to store generated tiles
 	define('TILE_DIR', 'tiles/');
@@ -103,13 +103,14 @@
             global $conn;
 		$nbPOIInsideTile = 0;
 
-	$result = pg_query($conn, $query);
         $spots = Array();
-	if (!$result) {
-		databaseError(pg_result_error($result));
+	$query = $conn->prepare($query);
+	$query->execute();
+	if (!$query) {
+		databaseError($conn->errorInfo());
 		return Array();
 	}
-	foreach( pg_fetch_all($result) as $row){
+	foreach( $query->fetchAll() as $row){
 				$point = GoogleMapUtility::getOffsetPixelCoords($row['stop_lat'], $row['stop_lon'], $zoom, $X, $Y);
 				//Count result only in the tile
 				if( ($point->x > -$offset) && ($point->x < (GoogleMapUtility::TILE_SIZE+$offset)) && ($point->y > -$offset) && ($point->y < (GoogleMapUtility::TILE_SIZE+$offset))){