diff --git a/amadeus/static/js/chat.js b/amadeus/static/js/chat.js
index 17410cb..1c51cf0 100644
--- a/amadeus/static/js/chat.js
+++ b/amadeus/static/js/chat.js
@@ -119,10 +119,33 @@ function getForm(field) {
 }
 
 function setChatFormSubmit() {
-    var frm = $('#chat-form');
+    var frm = $('#chat-form'),
+        error_msg = frm.data('error');
 
     frm.submit(function () {
-        var formData = new FormData($(this)[0]);
+        var formData = new FormData($(this)[0]),
+            file = $("#id_image")[0].files[0],
+            max_filesize = 5*1024*1024;
+
+        if (typeof(file) != "undefined") {
+            var image_container = $("#id_image").parent(),
+                overlay_msg = image_container.data('overlay'),
+                wrong_format_msg = image_container.data('invalid'),
+                file_type = file.type,
+                type_accept = /^image\/(jpg|png|jpeg|gif)$/;
+
+            if (file.size > max_filesize) {
+                image_container.append('<div class="alert alert-danger alert-dismissible" role="alert"><button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button><ul><li>' + overlay_msg + '</li></ul></div>');
+
+                return false;
+            }
+
+            if (!type_accept.test(file_type)) {
+                image_container.append('<div class="alert alert-danger alert-dismissible" role="alert"><button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button><ul><li>' + wrong_format_msg + '</li></ul></div>');
+
+                return false;   
+            }
+        }
 
         $.ajax({
             type: frm.attr('method'),
@@ -152,7 +175,12 @@ function setChatFormSubmit() {
                 $('#chat-modal-form').modal('hide');
             },
             error: function(data) {
-                $("#chat-modal-form").html(data.responseText);
+                if (data.status == 400) {
+                    $("#chat-modal-form").html(data.responseText);
+                } else {
+                    alertify.error(error_msg);
+                }
+
                 setChatFormSubmit();
             },
             cache: false,
diff --git a/chat/models.py b/chat/models.py
index 5e92986..3ac8da0 100644
--- a/chat/models.py
+++ b/chat/models.py
@@ -13,7 +13,7 @@ def validate_img_extension(value):
 	
 	if hasattr(value.file, 'content_type'):
 		if not value.file.content_type in valid_formats:
-			raise ValidationError(_('File not supported.'))
+			raise ValidationError(_('Select a valid file. The file must posses one of this extensions: .jpg, .png, .gif'))
 
 def upload_filename(instance, filename):
 	path = "chat/"
@@ -26,7 +26,7 @@ class Conversation(models.Model):
 	user_two = models.ForeignKey(User, verbose_name = _('User Two'), related_name = 'talk_user_end')
 
 class TalkMessages(models.Model):
-	text = models.TextField(_('Comment'), blank = True)
+	text = models.TextField(_('Message'), blank = True)
 	image = models.ImageField(verbose_name = _('Image'), null = True, blank = True, upload_to = upload_filename, validators = [validate_img_extension])
 	talk = models.ForeignKey(Conversation, verbose_name = _('Conversation'), related_name = 'message_talk', null = True)
 	user = models.ForeignKey(User, verbose_name = _('User'), related_name = 'message_user', null = True)
diff --git a/chat/templates/chat/_form.html b/chat/templates/chat/_form.html
index b96e09b..0cd1d14 100644
--- a/chat/templates/chat/_form.html
+++ b/chat/templates/chat/_form.html
@@ -4,7 +4,7 @@
 <div class="modal-dialog" role="document">
 	<div class="modal-content">
 		<div class="modal-body">
-			<form id="chat-form" method="post" action="{{ form_url }}" enctype="multipart/form-data">
+			<form id="chat-form" method="post" action="{{ form_url }}" enctype="multipart/form-data" data-error="{% trans 'Something went wrong. Please try again later.' %}">
 				{% csrf_token %}
 				
 				<div class="form-group{% if form.has_error %} has-error {% endif %}">
@@ -27,22 +27,22 @@
 					{% endif %}
 				</div>
 
-				<div class="form-group{% if form.has_error %} has-error {% endif %} is-fileinput">
+				<div class="form-group{% if form.has_error %} has-error {% endif %} is-fileinput" data-overlay="{% trans 'The image is too large. It should have less than 5MB.' %}" data-invalid="{% trans 'Select a valid file. The file must posses one of this extensions: .jpg, .png, .gif' %}">
 					{% render_field form.image %}
 
 				    <div class="filedrag">
-			    		{% trans 'Click or drop the file here' %}<br />
+			    		{% trans 'Click or drop the image here' %}<br />
 
-			      		<small>{% trans 'The file could not exceed 5MB.' %}</small>
+			      		<small>{% trans 'The image could not exceed 5MB.' %}</small>
 			  		</div>
 
 					<span id="helpBlock" class="help-block">{{ form.image.help_text }}</span>
 
 					{% if form.image.errors %}
 						<div class="alert alert-danger alert-dismissible" role="alert">
-								<button type="button" class="close" data-dismiss="alert" aria-label="Close">
-									<span aria-hidden="true">&times;</span>
-								</button>
+							<button type="button" class="close" data-dismiss="alert" aria-label="Close">
+								<span aria-hidden="true">&times;</span>
+							</button>
 							<ul>
 								{% for error in form.image.errors %}
 									<li>{{ error }}</li>
--
libgit2 0.21.2