diff --git a/kfet/static/kfet/js/account.js b/kfet/static/kfet/js/account.js
index 3e216155..ac98e1dd 100644
--- a/kfet/static/kfet/js/account.js
+++ b/kfet/static/kfet/js/account.js
@@ -10,7 +10,6 @@ var Account = Backbone.Model.extend({
         'is_frozen': false,
         'departement': '',
         'nickname': '',
-        'trigramme': '',
     },
 
     url: function () {
@@ -18,8 +17,8 @@ var Account = Backbone.Model.extend({
     },
 
     reset: function () {
-        // On ne veut pas trigger un `change` deux fois
-        this.clear({ silent: true }).set(this.defaults)
+        // On n'utilise pas .clear() car on ne veut pas clear le trigramme
+        this.set(this.defaults)
     },
 
     parse: function (resp, options) {
@@ -31,27 +30,37 @@ var Account = Backbone.Model.extend({
     },
 
     view: function () {
-        view_class = this.get("trigramme") == 'LIQ' ? LIQView : AccountView;
+        if (!this.is_valid()) {
+            view_class = EmptyAccountView
+        } else if (this.get("trigramme") == 'LIQ') {
+            view_class = LIQView
+        } else {
+            view_class = AccountView
+        }
         return new view_class({ model: this })
     },
 
     render: function () {
         this.view().render();
-    }
+    },
+
+    is_valid: function () {
+        return (this.id != 0)
+    },
 })
 
 var AccountView = Backbone.View.extend({
 
     el: '#account',
-    input: '#id_trigramme',
     buttons: '.buttons',
+    id_field: "#id_on_acc",
 
     props: _.keys(Account.prototype.defaults),
 
     get: function (property) {
         /* If the function this.get_<property> is defined,
         we call it ; else we call this.model.<property>. */
-        getter_name = 'get_' + property;
+        getter_name = `get_${property}`;
         if (_.functions(this).includes(getter_name))
             return this[getter_name]()
         else
@@ -67,9 +76,9 @@ var AccountView = Backbone.View.extend({
     },
 
     attr_data_balance: function () {
-        if (this.model.id == 0) {
-            return '';
-        } else if (this.model.get("is_frozen")) {
+        // Cette fonction est utilisée uniquement sur un compte valide
+
+        if (this.model.get("is_frozen")) {
             return "frozen";
         } else if (this.model.get("balance") < 0) {
             return 'neg';
@@ -81,23 +90,9 @@ var AccountView = Backbone.View.extend({
     },
 
     get_buttons: function () {
-        var buttons = '';
-        if (this.model.id != 0) {
-            var url = django_urls["kfet.account.read"](encodeURIComponent(this.model.get("trigramme")))
-            buttons += `<a href="${url}" class="btn btn-primary" target="_blank" title="Modifier"><span class="glyphicon glyphicon-cog"></span></a>`;
-        } else {
-            var trigramme = this.$(this.input).val().toUpperCase();
-            if (isValidTrigramme(trigramme)) {
-                trigramme = encodeURIComponent(trigramme);
-                var url_base = django_urls["kfet.account.create"]();
-                var url = `${url_base}?trigramme=${trigramme}`;
-                buttons += `<a href="${url}" class="btn btn-primary" target="_blank" title="Créer"><span class="glyphicon glyphicon-plus"></span></a>`;
-            } else {
-                buttons += '<button class="btn btn-primary search" title="Rechercher"><span class="glyphicon glyphicon-search"></span></button>';
-            }
-        }
+        var url = django_urls["kfet.account.read"](this.model.get("trigramme"));
 
-        return buttons
+        return `<a href="${url}" class="btn btn-primary" target="_blank" title="Modifier"><span class="glyphicon glyphicon-cog"></span></a>`;
     },
 
     render: function () {
@@ -108,16 +103,7 @@ var AccountView = Backbone.View.extend({
 
         this.$el.attr("data-balance", this.attr_data_balance());
         this.$(this.buttons).html(this.get_buttons());
-    },
-
-    reset: function () {
-        for (let prop of this.props) {
-            var selector = "#account-" + prop;
-            this.$(selector).text('');
-        }
-
-        this.$el.attr("data-balance", '');
-        this.$(this.buttons).html(this.get_buttons());
+        $(this.id_field).val(this.get("id"));
     },
 })
 
@@ -131,3 +117,28 @@ var LIQView = AccountView.extend({
     }
 })
 
+var EmptyAccountView = AccountView.extend({
+    get: function () {
+        return '';
+    },
+
+    attr_data_balance: function () {
+        return '';
+    },
+
+    get_buttons: function () {
+        /* Léger changement de fonctionnement :
+        on affiche *toujours* le bouton de recherche si
+        le compte est invalide */
+        buttons = '<button class="btn btn-primary search" title="Rechercher"><span class="glyphicon glyphicon-search"></span></button>';
+        trigramme = this.model.get("trigramme")
+        if (trigramme.is_valid_tri()) {
+            trigramme = encodeURIComponent(trigramme);
+            var url_base = django_urls["kfet.account.create"]();
+            var url = `${url_base}?trigramme=${trigramme}`;
+            buttons += `<a href="${url}" class="btn btn-primary" target="_blank" title="Créer"><span class="glyphicon glyphicon-plus"></span></a>`;
+        }
+
+        return buttons
+    }
+})
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