AngularJS 1.0rc1enter key to submit

HTML

<link type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.12/themes/redmond/jquery-ui.css" rel="stylesheet" />
<link rel="stylesheet" type="text/css" href="http://ajax.aspnetcdn.com/ajax/jquery.dataTables/1.8.2/css/jquery.dataTables.css">
 
<div ng-app="example">
    <div ng-controller="Ctrl">   

    <form ng:submit="submitted=modelProperty">
      <input type="text" 
        name="foo" 
        placeholder="type somehere here and hit enter" 
        size="40"
        ng-model="modelProperty"     
        ng-model-instant>
      <input type="submit" value="submit">
    </form>
        
submitted: {{submitted}}
    </div>
</div>

CSS

</style>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js"></script>
<!-- DataTables -->
<script type="text/javascript" charset="utf8" src="http://ajax.aspnetcdn.com/ajax/jquery.dataTables/1.8.2/jquery.dataTables.min.js"></script>

<script src="http://code.angularjs.org/angular-1.0.0rc1.js"></script>
<style>

.ng-invalid { border: 1px solid red; } 
body { font-family: Arial,Helvetica,sans-serif; }
body, td, th { font-size: 14px; margin: 0; }
table { border-collapse: separate; border-spacing: 2px; display: table; margin-bottom: 0; margin-top: 0; -moz-box-sizing: border-box; text-indent: 0; }
a:link, a:visited, a:hover { color: #5D6DB6; text-decoration: none; }
.error { color: red; }
.ui-helper-hidden { display: none;}

JavaScript

var dialogApp = angular.module('example', []);


function Ctrl($scope) {

    //$scope.x = {};
            
    
    
            
}