diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/cat-toolbar.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/cat-toolbar.inc
index 0a6f2ec308..31714d329c 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/cat-toolbar.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/cat-toolbar.inc
@@ -10,6 +10,11 @@
 			window.open("/cgi-bin/koha/cataloguing/z3950_search.pl?biblionumber=[% biblionumber %]"+strQuery,"z3950search",'width=740,height=450,location=yes,toolbar=no,scrollbars=yes,resize=yes');
 		} 
 	}
+    function PopupZ3950Confirmed() {
+        if (confirm(_("Please note that this Z39.50 search could replace the current record."))){
+            PopupZ3950();
+        }
+    }
 
 	/* provide Z3950 search points */
 	function GetZ3950Terms(){
@@ -239,7 +244,7 @@ function confirm_items_deletion() {
 	[% IF ( CAN_user_reserveforothers ) %]
     [% UNLESS ( norequests ) %]<li><a id="placehold" href="/cgi-bin/koha/reserve/request.pl?biblionumber=[% biblionumber %]">Place hold</a></li>[% END %]
 	[% END %]
-	[% IF ( CAN_user_editcatalogue_edit_catalogue ) %]<li id="z3950searchc"><input type="button" id="z3950search" value="Z39.50 Search" onclick="if (confirm(_('Please note that this Z39.50 search could replace the current record.'))){ PopupZ3950(); } return false;" /></li>[% END %]
+	[% IF ( CAN_user_editcatalogue_edit_catalogue ) %]<li id="z3950searchc"><input type="button" id="z3950search" value="Z39.50 Search" onclick="PopupZ3950Confirmed(); return false;" /></li>[% END %]
     </ul>
 </form>
 </div>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/manage-marc-import.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/manage-marc-import.tt
index 0e350fc754..e0325bb8b3 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/manage-marc-import.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/manage-marc-import.tt
@@ -28,6 +28,8 @@
 <script type="text/javascript" src="[% themelang %]/js/background-job-progressbar.js"></script>
 <script type="text/JavaScript" language="JavaScript">
 //<![CDATA[
+var MSG_CONFIRM_CLEAN = _("Clear all reservoir records staged in this batch?  This cannot be undone.");
+
 $(document).ready(function(){
   $("#staged-record-matching-rules select").change(function(){
       var str = $(this).attr("id");
@@ -291,7 +293,7 @@ Page
           <form method="post" action="[% batch_lis.script_name %]" name="clean_batch_[% batch_lis.import_batch_id %]" id="clean_batch_[% batch_lis.import_batch_id %]" >
             <input type="hidden" name="import_batch_id" value="[% batch_lis.import_batch_id %]" />
             <input type="hidden" name="op" value="clean-batch" />
-            <input type="submit" class="button" value="Clean" onclick="return confirm(_('Clear all reservoir records staged in this batch?  This cannot be undone.'));" />
+            <input type="submit" class="button" value="Clean" onclick="return confirm(MSG_CONFIRM_CLEAN);" />
           </form>
         [% END %]
     </td>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/quotes.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/quotes.tt
index a16c51a0ff..7a838d0541 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/quotes.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/quotes.tt
@@ -10,6 +10,8 @@
     <script type="text/javascript" src="[% themelang %]/js/jquery.jeditable.mini.js"></script>
     <script type="text/javascript">
     //<![CDATA[
+    var MSG_ID_HELP = _("Click on the quote's id to select or deselect the quote. Multiple quotes may be selected.");
+
     var oTable; /* oTable needs to be global */
     var sEmptyTable = _("No quotes available. Please use the \"Add quote\" button to add a quote."); /* override the default message in datatables-strings.inc */
     $(document).ready(function() {
@@ -204,7 +206,7 @@
                 <table id="quotes_editor">
                 <thead>
                     <tr>
-                        <th><span style="cursor: help" onclick="event.stopPropagation();alert(_('Click on the quote\'s id to select or deselect the quote. Multiple quotes may be selected.'));">ID</span></th>
+                        <th><span style="cursor: help" onclick="event.stopPropagation();alert(MSG_ID_HELP);">ID</span></th>
                         <th>Source</th>
                         <th>Text</th>
                         <th>Last displayed</th>
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/virtualshelves/shelves.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/virtualshelves/shelves.tt
index 02305f9157..fde2b1f949 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/virtualshelves/shelves.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/virtualshelves/shelves.tt
@@ -6,6 +6,8 @@
 //<![CDATA[ 
 
 var MSG_NO_ITEM_SELECTED = _("Nothing is selected.");
+var MSG_REMOVE_FROM_LIST = _("Are you sure you want to remove these records from the shelf?");
+var MSG_CONFIRM_DELETE_LIST = _("Are you sure you want to remove this list?");
 
 $(document).ready(function(){
 	$("#addbarcode").focus();
@@ -247,7 +249,7 @@ function placeHold () {
     </table><fieldset class="action">
         [% IF ( itemsloop ) %]
             <input type="button" id="placehold" style="display:none" onclick="placeHold(); return false;" value="Place holds" />
-            [% IF ( allowremovingitems ) %]<input type="submit" value="Remove selected records" onclick="return confirm(_('Are you sure you want to remove these records from the shelf?'));" />[% END %]
+            [% IF ( allowremovingitems ) %]<input type="submit" value="Remove selected records" onclick="return confirm(MSG_REMOVE_FROM_LIST);" />[% END %]
             <input type="submit" value="Merge selected records" onclick="return MergeItems();" />
         [% END %]
  </fieldset>
@@ -410,7 +412,7 @@ function placeHold () {
 					<input type="hidden" name="CONFIRM-[% shelveslooppri.confirm %]" value="1" />
 					<input type="submit" class="approve" value="Confirm" />
 					[% ELSE %]
-                    <input type="submit" class="deleteshelf" onclick="return confirmDelete(_('Are you sure you want to remove this list?'));" value="Delete" />
+                    <input type="submit" class="deleteshelf" onclick="return confirmDelete(MSG_CONFIRM_DELETE_LIST);" value="Delete" />
 					[% END %]
 				</form>
 			[% ELSE %]
@@ -458,7 +460,7 @@ function placeHold () {
 					<input type="hidden" name="CONFIRM-[% shelvesloo.confirm %]" value="1" />
 					<input type="submit" class="approve" value="Confirm" />
 					[% ELSE %]
-                    <input type="submit" class="deleteshelf" onclick="return confirmDelete(_('Are you sure you want to remove this list?'));" value="Delete" />
+                    <input type="submit" class="deleteshelf" onclick="return confirmDelete(MSG_CONFIRM_DELETE_LIST);" value="Delete" />
 					[% END %]
 				</form>
 			[% ELSE %]
diff --git a/koha-tmpl/opac-tmpl/prog/en/includes/doc-head-close.inc b/koha-tmpl/opac-tmpl/prog/en/includes/doc-head-close.inc
index 7ac03925f2..ef7faac7f2 100644
--- a/koha-tmpl/opac-tmpl/prog/en/includes/doc-head-close.inc
+++ b/koha-tmpl/opac-tmpl/prog/en/includes/doc-head-close.inc
@@ -51,6 +51,8 @@
 
 <script type="text/javascript" language="javascript">
 	//<![CDATA[
+    var MSG_CONFIRM_AGAIN = _("Warning: Cannot be undone. Please confirm once again")
+    var MSG_DELETE_SEARCH_HISTORY = _("Are you sure you want to delete your search history?");
     [% IF ( opacbookbag ) %]var MSG_BASKET_EMPTY = _("Your cart is currently empty");
     var MSG_RECORD_IN_BASKET = _("This item is already in your cart");
     var MSG_RECORD_ADDED = _("This item has been added to your cart");
diff --git a/koha-tmpl/opac-tmpl/prog/en/includes/masthead.inc b/koha-tmpl/opac-tmpl/prog/en/includes/masthead.inc
index de2d2da3f9..89f6852465 100644
--- a/koha-tmpl/opac-tmpl/prog/en/includes/masthead.inc
+++ b/koha-tmpl/opac-tmpl/prog/en/includes/masthead.inc
@@ -8,7 +8,7 @@
 
             [% END %]
             [% IF ( ShowOpacRecentSearchLink ) %]
-                <li><a href="/cgi-bin/koha/opac-search-history.pl" title="View your search history">Search history</a> [<a class="logout" href="/cgi-bin/koha/opac-search-history.pl?action=delete" title="Delete your search history" onclick="return confirm(_('Are you sure you want to delete your search history?'));">x</a>]</li>
+                <li><a href="/cgi-bin/koha/opac-search-history.pl" title="View your search history">Search history</a> [<a class="logout" href="/cgi-bin/koha/opac-search-history.pl?action=delete" title="Delete your search history" onclick="return confirm(MSG_DELETE_SEARCH_HISTORY);">x</a>]</li>
             [% END %]
 			[% IF ( loggedinusername ) %]<li><a class="logout" id="logout" href="/cgi-bin/koha/opac-main.pl?logout.x=1">Log Out</a></li>[% END %]
    	</ul>	
diff --git a/koha-tmpl/opac-tmpl/prog/en/modules/opac-privacy.tt b/koha-tmpl/opac-tmpl/prog/en/modules/opac-privacy.tt
index 6440351e8a..5245fdfea7 100644
--- a/koha-tmpl/opac-tmpl/prog/en/modules/opac-privacy.tt
+++ b/koha-tmpl/opac-tmpl/prog/en/modules/opac-privacy.tt
@@ -55,7 +55,7 @@
         <form action="/cgi-bin/koha/opac-privacy.pl" method="post" id="opac-privacy-delete-form">
             <input type="hidden" name="op" value="delete_record" />
             <p>Whatever your privacy rule you choose, you can delete all your reading history immediately by clicking here. <b>BE CAREFUL</b>. Once you've confirmed the deletion, no one can retrieve the list!</p>
-            <input type="submit" value="Immediate deletion" onclick="return confirmDelete(_('Warning: Cannot be undone. Please confirm once again'));" />
+            <input type="submit" value="Immediate deletion" onclick="return confirmDelete(MSG_CONFIRM_AGAIN);" />
         </form>
     [% END %]
     </div>