Use property instead of attribute (#2606)

lemonldap-ng-portal/site/coffee/portal.coffee

@@ -618,11 +618,11 @@ $(window).on 'load', () ->
 				user = data.user
 				console.log 'Suggested spoofId=', user
 				$("input[name=spoofId]").each ->
-					$(this).attr 'value', user
+					$(this).val user
 				$('#captcha').attr 'src', data.captcha if data.captcha
 				if data.token
-					$('#finduserToken').attr 'value', data.token 
-					$('#token').attr 'value', data.token
+					$('#finduserToken').val data.token 
+					$('#token').val data.token
 			error: (j, status, err) ->
 				document.body.style.cursor = 'default'
 				console.log 'Error', err  if err

lemonldap-ng-portal/site/htdocs/static/common/js/portal.js

@@ -687,14 +687,14 @@ LemonLDAP::NG Portal jQuery scripts
           user = data.user;
           console.log('Suggested spoofId=', user);
           $("input[name=spoofId]").each(function() {
-            return $(this).attr('value', user);
+            return $(this).val(user);
           });
           if (data.captcha) {
             $('#captcha').attr('src', data.captcha);
           }
           if (data.token) {
-            $('#finduserToken').attr('value', data.token);
-            return $('#token').attr('value', data.token);
+            $('#finduserToken').val(data.token);
+            return $('#token').val(data.token);
           }
         },
         error: function(j, status, err) {