diff --git a/acrobat-plugin/src/Imposition-00-Core.js b/acrobat-plugin/src/Imposition-00-Core.js
index 1ade93f..b3222fb 100755
--- a/acrobat-plugin/src/Imposition-00-Core.js
+++ b/acrobat-plugin/src/Imposition-00-Core.js
@@ -241,7 +241,7 @@ try {
         cName: "CDImpLivret",
         cUser: "Livret / Delivretiser",
         cParent: "ImpositionPro",
-        cExec: "try{app.alert('Livret: lancement...');CDImp.Livret.lancer(event.target);}catch(e){app.alert('Erreur: '+e);}",
+        cExec: "try{CDImp.Livret.lancer();}catch(e){app.alert('Erreur: '+e);}",
         cEnable: "event.rc = true;",
         nPos: 0
     });
@@ -251,7 +251,7 @@ try {
         cName: "CDImpNUp",
         cUser: "N-Up / Step and Repeat",
         cParent: "ImpositionPro",
-        cExec: "if(CDImp.NUp&&CDImp.NUp.lancer)CDImp.NUp.lancer(event.target);",
+        cExec: "if(CDImp.NUp&&CDImp.NUp.lancer)CDImp.NUp.lancer();",
         cEnable: "event.rc = true;",
         nPos: 1
     });
@@ -261,7 +261,7 @@ try {
         cName: "CDImpDecoupe",
         cUser: "Decoupe et reassemblage",
         cParent: "ImpositionPro",
-        cExec: "if(CDImp.Decoupe&&CDImp.Decoupe.lancer)CDImp.Decoupe.lancer(event.target);",
+        cExec: "if(CDImp.Decoupe&&CDImp.Decoupe.lancer)CDImp.Decoupe.lancer();",
         cEnable: "event.rc = true;",
         nPos: 2
     });
@@ -271,7 +271,7 @@ try {
         cName: "CDImpMarges",
         cUser: "Marges et cadrages",
         cParent: "ImpositionPro",
-        cExec: "if(CDImp.Marges&&CDImp.Marges.lancer)CDImp.Marges.lancer(event.target);",
+        cExec: "if(CDImp.Marges&&CDImp.Marges.lancer)CDImp.Marges.lancer();",
         cEnable: "event.rc = true;",
         nPos: 3
     });
@@ -281,7 +281,7 @@ try {
         cName: "CDImpReperes",
         cUser: "Reperes et numerotation",
         cParent: "ImpositionPro",
-        cExec: "if(CDImp.Reperes&&CDImp.Reperes.lancer)CDImp.Reperes.lancer(event.target);",
+        cExec: "if(CDImp.Reperes&&CDImp.Reperes.lancer)CDImp.Reperes.lancer();",
         cEnable: "event.rc = true;",
         nPos: 4
     });
@@ -291,7 +291,7 @@ try {
         cName: "CDImpAuto",
         cUser: "Automatisation",
         cParent: "ImpositionPro",
-        cExec: "if(CDImp.Auto&&CDImp.Auto.lancer)CDImp.Auto.lancer(event.target);",
+        cExec: "if(CDImp.Auto&&CDImp.Auto.lancer)CDImp.Auto.lancer();",
         cEnable: "event.rc = true;",
         nPos: 5
     });
diff --git a/acrobat-plugin/src/Imposition-02-Livret.js b/acrobat-plugin/src/Imposition-02-Livret.js
index 5cca0c6..59396b1 100755
--- a/acrobat-plugin/src/Imposition-02-Livret.js
+++ b/acrobat-plugin/src/Imposition-02-Livret.js
@@ -243,19 +243,22 @@ CDImp.Livret.lancer = function (doc) {
     try {
         doc = CDImp.Util.getDocActif(doc);
     } catch (e) {
-        CDImp.Util.erreur(e.toString());
+        app.alert("Veuillez ouvrir un document PDF avant de lancer l'imposition.");
         return;
     }
 
-    var sens = app.popUpMenu(
-        { cName: "Creer un livret (imposition)", cReturn: "imposer" },
-        { cName: "Delivretiser (revenir a l'ordre de lecture)", cReturn: "delivretiser" }
-    );
-    if (!sens) {
-        return; // annulation
+    var choix = app.alert({
+        cMsg: "Que souhaitez-vous faire ?\n\nOui = Creer un livret (imposition)\nNon = Delivretiser (revenir a l'ordre de lecture)",
+        cTitle: "Livret / Delivretiser",
+        nIcon: 2,
+        nType: 3
+    });
+    // 4=Oui, 3=Non, 2=Annuler
+    if (choix === 2) {
+        return;
     }
 
-    if (sens === "delivretiser") {
+    if (choix === 3) {
         CDImp.Livret.delivretiser(doc);
         return;
     }