diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index e3e753ab7eb..f7efaff7b50 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -2200,7 +2200,7 @@ if ($action == 'create')
 			// Show credit note options only if we checked credit note
 			print '<script type="text/javascript" language="javascript">
 			jQuery(document).ready(function() {
-				if (! jQuery("#radio_creditnote").prop("checked"))
+				if (! jQuery("#radio_creditnote").is(":checked"))
 				{
 					jQuery("#credit_note_options").hide();
 				}
diff --git a/htdocs/install/fileconf.php b/htdocs/install/fileconf.php
index 48599d51323..97a52ff6c34 100644
--- a/htdocs/install/fileconf.php
+++ b/htdocs/install/fileconf.php
@@ -488,7 +488,7 @@ jQuery(document).ready(function() {
 	function init_needroot()
 	{
 		/*alert(jQuery("#db_create_database").prop("checked")); */
-		if (jQuery("#db_create_database").prop("checked") || jQuery("#db_create_user").prop("checked"))
+		if (jQuery("#db_create_database").is(":checked") || jQuery("#db_create_user").is(":checked"))
 		{
 			jQuery(".hideroot").show();
 			jQuery(".needroot").removeAttr('disabled');
diff --git a/htdocs/user/card.php b/htdocs/user/card.php
index 8211adbb4bc..1cbeb6e653d 100644
--- a/htdocs/user/card.php
+++ b/htdocs/user/card.php
@@ -831,7 +831,7 @@ if (($action == 'create') || ($action == 'adduserldap'))
 									 }
 								});
 								$("input[name=superadmin]").change(function() {
-									if ( $(this).prop("checked", true) ) {
+									if ( $(this).is(":checked") ) {
 										$("select[name=entity]")
 											.prop("disabled", true);
 									} else {
@@ -1825,7 +1825,7 @@ else
 													.prop("disabled", true)
 													.prop("checked", false);
 										}
-										if ($("input[name=superadmin]").prop("checked", true)) {
+										if ($("input[name=superadmin]").is(":checked")) {
 											$("select[name=entity]")
 													.prop("disabled", true);
 										}
@@ -1842,7 +1842,7 @@ else
 											 }
 										});
 										$("input[name=superadmin]").change(function() {
-											if ( $(this).prop("checked", true)) {
+											if ( $(this).is(":checked")) {
 												$("select[name=entity]")
 													.prop("disabled", true);
 											} else {