diff --git a/htdocs/core/lib/project.lib.php b/htdocs/core/lib/project.lib.php
index 776d0f0776f..e32eb092a46 100644
--- a/htdocs/core/lib/project.lib.php
+++ b/htdocs/core/lib/project.lib.php
@@ -1226,13 +1226,14 @@ function projectLinesPerAction(&$inc, $parent, $fuser, $lines, &$level, &$projec
 
 			print convertSecondToTime($lines[$i]->timespent_duration, 'allhourmin');
 
-			$modeinput = 'hours';
+			// Comment for avoid unnecessary multiple calculation
+			/*$modeinput = 'hours';
 
 			print '<script type="text/javascript">';
 			print "jQuery(document).ready(function () {\n";
 			print " 	jQuery('.inputhour, .inputminute').bind('keyup', function(e) { updateTotal(0, '".$modeinput."') });";
 			print "})\n";
-			print '</script>';
+			print '</script>';*/
 
 			print '</td>';
 
@@ -1613,13 +1614,14 @@ function projectLinesPerDay(&$inc, $parent, $fuser, $lines, &$level, &$projectsr
 				//$tableCell.='&nbsp;<input type="submit" class="button"'.($disabledtask?' disabled':'').' value="'.$langs->trans("Add").'">';
 				print $tableCell;
 
-				$modeinput = 'hours';
+				// Comment for avoid unnecessary multiple calculation
+				/*$modeinput = 'hours';
 
 				print '<script type="text/javascript">';
 				print "jQuery(document).ready(function () {\n";
 				print " 	jQuery('.inputhour, .inputminute').bind('keyup', function(e) { updateTotal(0, '".$modeinput."') });";
 				print "})\n";
-				print '</script>';
+				print '</script>';*/
 
 				print '</td>';
 
diff --git a/htdocs/projet/activity/perday.php b/htdocs/projet/activity/perday.php
index c191b3baeaa..86df142d40c 100644
--- a/htdocs/projet/activity/perday.php
+++ b/htdocs/projet/activity/perday.php
@@ -795,12 +795,12 @@ print '</div>';
 
 print '</form>';
 
-$modeinput = 'hours';
-
-if ($conf->use_javascript_ajax) {
+if (!empty($conf->use_javascript_ajax)) {
+	$modeinput = 'hours';
 	print "\n<!-- JS CODE TO ENABLE Tooltips on all object with class classfortooltip -->\n";
 	print '<script type="text/javascript">'."\n";
 	print "jQuery(document).ready(function () {\n";
+	print "		updateTotal(0,\''.$modeinput.'\');\n";
 	print '		jQuery(".timesheetalreadyrecorded").tooltip({
 					show: { collision: "flipfit", effect:\'toggle\', delay:50 },
 					hide: { effect:\'toggle\', delay: 50 },
@@ -809,8 +809,7 @@ if ($conf->use_javascript_ajax) {
 						return \''.dol_escape_js($langs->trans("TimeAlreadyRecorded", $usertoprocess->getFullName($langs))).'\';
 					}
 				});'."\n";
-
-	print '    updateTotal(0,\''.$modeinput.'\');';
+	print " 	jQuery('.inputhour, .inputminute').bind('keyup', function(e) { updateTotal(0, '".$modeinput."') });";
 	print "\n});\n";
 	print '</script>';
 }