backbone view 绑定视图事件报没有off方法

<!DOCTYPE html>
<html>
<head>
    <script src="jquery.js"></script>
    <script src="underscore.js"></script>
    <script src="backbone.js"></script>
</head>
<body>
    <div id="search_container"></div>
    <script type="text/javascript">
        SearchView = Backbone.View.extend({
            events: {
                "click": "open"
            },
            open: function( event ){
                alert();
            }
        });
        var search_view = new SearchView({ el: $("#search_container") });
    </script>
</body>
</html>

Uncaught TypeError: Object [object Object] has no method 'off' backbone.js:1143
_.extend.undelegateEvents backbone.js:1143
_.extend.delegateEvents backbone.js:1121
_.extend.setElement backbone.js:1092
_.extend._ensureElement backbone.js:1171
Backbone.View backbone.js:1039
child backbone.js:1661
(anonymous function)

var search_view = new SearchView({ el: "#search_container") });
el不应该传jquery对象