diff --git a/htdocs/comm/propal.php b/htdocs/comm/propal.php
index df04fb4cea3..d66a830d90d 100644
--- a/htdocs/comm/propal.php
+++ b/htdocs/comm/propal.php
@@ -1429,7 +1429,7 @@ if ($id > 0 || ! empty($ref))
 	print '<table id="tablelines" class="noborder" width="100%">';
 
 	// Show object lines
-	if (! empty($object->lines)) $object->printObjectLines($mysoc,$soc,GETPOST('lineid'));
+	if (! empty($object->lines)) $object->printObjectLines(GETPOST('action'),$mysoc,$soc,GETPOST('lineid'));
 	
 	//print '<table id="tablelines" class="noborder" width="100%">';
 
diff --git a/htdocs/commande/fiche.php b/htdocs/commande/fiche.php
index fcfbbd29e7a..68cde7f28e2 100644
--- a/htdocs/commande/fiche.php
+++ b/htdocs/commande/fiche.php
@@ -1819,7 +1819,7 @@ else
             print '<table id="tablelines" class="noborder" width="100%">';
 
             // Show object lines
-            if (! empty($object->lines)) $object->printObjectLines($mysoc,$soc,GETPOST('lineid'),1);
+            if (! empty($object->lines)) $object->printObjectLines(GETPOST('action'),$mysoc,$soc,GETPOST('lineid'),1);
 
             /*
              * Form to add new line
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index f71dff03761..d81daf75991 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -2534,7 +2534,7 @@ else
 			print '<table id="tablelines" class="noborder" width="100%">';
 
 		    // Show object lines
-		    if (! empty($object->lines)) $object->printObjectLines($mysoc,$soc,GETPOST('lineid'),1);
+		    if (! empty($object->lines)) $object->printObjectLines(GETPOST('action'),$mysoc,$soc,GETPOST('lineid'),1);
 
 			/*
 			 * Form to add new line
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index e0cc7ca0b0a..ae4345a0369 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -1464,7 +1464,7 @@ class CommonObject
      *  @param		$selected		   Object line selected
      *  @param      $dateSelector      1=Show also date range input fields
 	 */
-	function printObjectLines($seller,$buyer,$selected=0,$dateSelector=0)
+	function printObjectLines($action='viewline',$seller,$buyer,$selected=0,$dateSelector=0)
 	{
 		global $conf,$langs;
 		
@@ -1509,11 +1509,11 @@ class CommonObject
 
 			if (($line->product_type == 9 && ! empty($line->special_code)) || ! empty($line->fk_parent_line))
 			{
-				if (empty($line->fk_parent_line)) $this->hooks[$line->special_code]->printObjectLine($this,$line,$var,$num,$i,$dateSelector,$seller,$buyer,$selected);
+				if (empty($line->fk_parent_line)) $this->hooks[$line->special_code]->printObjectLine($action,$this,$line,$var,$num,$i,$dateSelector,$seller,$buyer,$selected);
 			}
 			else
 			{
-				$this->printLine($line,$var,$num,$i,$dateSelector,$seller,$buyer,$selected);
+				$this->printLine($action,$line,$var,$num,$i,$dateSelector,$seller,$buyer,$selected);
 			}
 
 			$i++;
@@ -1527,6 +1527,7 @@ class CommonObject
      *  TODO Move this into an output class file (htmlline.class.php)
      *  If lines are into a template, title must also be into a template
      *  But for the moment we don't know if it's possible as we keep a method available on overloaded objects.
+     *  @param		$action			   GET/POST action
 	 * 	@param	    $line		       Selected object line to output
 	 *  @param      $var               Is it a an odd line
 	 *  @param      $num               Number of line
@@ -1536,7 +1537,7 @@ class CommonObject
      *  @param      $buyer             Object of buyer third party
      *  @param		$selected		   Object line selected
 	 */
-	function printLine($line,$var=true,$num=0,$i=0,$dateSelector=0,$seller,$buyer,$selected=0)
+	function printLine($action='viewline',$line,$var=true,$num=0,$i=0,$dateSelector=0,$seller,$buyer,$selected=0)
 	{
 		global $conf,$langs,$user;
 		global $html,$bc,$bcdd;
@@ -1552,8 +1553,7 @@ class CommonObject
 		if (! empty($line->date_end)) $type=1;
 
 		// Ligne en mode visu
-		// TODO Do not use GET here, but put information into parameter of function
-		if ($_GET['action'] != 'editline' || $selected != $line->id)
+		if ($action != 'editline' || $selected != $line->id)
 		{
 			// Produit
 			if ($line->fk_product > 0)
@@ -1580,7 +1580,7 @@ class CommonObject
 		}
 
 		// Ligne en mode update
-		if ($this->statut == 0 && $_GET["action"] == 'editline' && $selected == $line->id)
+		if ($this->statut == 0 && $action == 'editline' && $selected == $line->id)
 		{
 			if ($line->fk_product > 0)
 			{