diff --git a/htdocs/lib/datepicker.php b/htdocs/lib/datepicker.php
index 7c17568e527..35a3c2c04e5 100644
--- a/htdocs/lib/datepicker.php
+++ b/htdocs/lib/datepicker.php
@@ -122,7 +122,7 @@ function xyzToUnixTimestamp($mysqldate){
 }
 
 function displayBox($selectedDate,$month,$year){
-	global $dolibarr_main_url_root,$langs,$conf;
+	global $langs,$conf;
 
 	//print "$selectedDate,$month,$year";
 	$thedate=dol_mktime(12,0,0,$month,1,$year);
@@ -154,15 +154,15 @@ function displayBox($selectedDate,$month,$year){
 	</tr>
 	<tr>
 		<td class="dpButtons"
-			onClick="loadMonth('<?php echo $dolibarr_main_url_root.'/lib/' ?>','<?php echo $month?>','<?php echo $year-1?>','<?php echo $xyz ?>')">&lt;&lt;</td>
+			onClick="loadMonth('<?php echo DOL_URL_ROOT.'/lib/' ?>','<?php echo $month?>','<?php echo $year-1?>','<?php echo $xyz ?>')">&lt;&lt;</td>
 		<td class="dpButtons"
-			onClick="loadMonth('<?php echo $dolibarr_main_url_root.'/lib/' ?>','<?php if($month==1) echo "12"; else echo $month-1?>','<?php if($month==1) echo $year-1; else echo $year?>','<?php echo $xyz ?>')">&lt;</td>
+			onClick="loadMonth('<?php echo DOL_URL_ROOT.'/lib/' ?>','<?php if($month==1) echo "12"; else echo $month-1?>','<?php if($month==1) echo $year-1; else echo $year?>','<?php echo $xyz ?>')">&lt;</td>
 		<td colspan="3" class="dpButtons"
-			onClick="loadMonth('<?php echo $dolibarr_main_url_root.'/lib/' ?>','<?php echo dol_date('m',$today)?>','<?php echo $todayArray["year"]?>','<?php echo $xyz ?>')"><?php echo $langs->trans("MonthOfDay") ?></td>
+			onClick="loadMonth('<?php echo DOL_URL_ROOT.'/lib/' ?>','<?php echo dol_date('m',$today)?>','<?php echo $todayArray["year"]?>','<?php echo $xyz ?>')"><?php echo $langs->trans("MonthOfDay") ?></td>
 		<td class="dpButtons"
-			onClick="loadMonth('<?php echo $dolibarr_main_url_root.'/lib/' ?>','<?php if($month==12) echo "1"; else echo $month+1?>','<?php if($month==12) echo $year+1; else echo $year;?>','<?php echo $xyz ?>')">&gt;</td>
+			onClick="loadMonth('<?php echo DOL_URL_ROOT.'/lib/' ?>','<?php if($month==12) echo "1"; else echo $month+1?>','<?php if($month==12) echo $year+1; else echo $year;?>','<?php echo $xyz ?>')">&gt;</td>
 		<td class="dpButtons"
-			onClick="loadMonth('<?php echo $dolibarr_main_url_root.'/lib/' ?>','<?php echo $month?>','<?php echo $year+1?>','<?php echo $xyz ?>')">&gt;&gt;</td>
+			onClick="loadMonth('<?php echo DOL_URL_ROOT.'/lib/' ?>','<?php echo $month?>','<?php echo $year+1?>','<?php echo $xyz ?>')">&gt;&gt;</td>
 	</tr>
 	<tr class="dpDayNames">
 		<td width="14%"><?php echo $langs->trans("ShortSunday") ?></td>
diff --git a/htdocs/lib/lib_head.js b/htdocs/lib/lib_head.js
index d0607f9cff5..2ede96e8ffa 100644
--- a/htdocs/lib/lib_head.js
+++ b/htdocs/lib/lib_head.js
@@ -162,7 +162,8 @@ function loadMonth(base,month,year,ymd)
 	var req=null;
 	
 	req=loadXMLDoc(theURL,null,false);
-	//alert(theURL+req.responseText);   // L'url doit avoir la meme racine que la pages et elements sinon pb de securite.
+	if (req.responseText == '') alert('Failed to get URL '.theURL);
+ 	//alert(theURL+' - '+req.responseText);  // L'url doit avoir la meme racine que la pages et elements sinon pb de securite.
 	showDP.box.innerHTML=req.responseText;	
 }