dojo技术问题

<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.9.0/dojo/dojo.js"></script>

<script type="text/javascript">

require([

		"dojo/_base/declare",

		"dojo/request/script"

	], function (declare,script) {

	    declare("OrderMap", null, {

        map: null,

        sellerUsername: null,

        constructor: function (map, sellerUsername) {

            this.map = map;

            this.sellerUsername = sellerUsername;

        },

	});

	}

	);



    var map="1111";

    var orderMap = new OrderMap(map, sellerUsername);

    //orderMap.show();

</script>

运行时出现OrderMap未定义 错在哪里？
------解决方案--------------------
1,constructor定义的结尾多了个,
2.你的OrderMap实例不在作用域内.
你看这个示例url:http://dojotoolkit.org/reference-guide/1.9/dojo/_base/declare.html

require(["dojo/_base/declare"], function(declare){

  var A = declare(null, {

    constructor: function(){ console.log("A"); }

  });



  var B = declare(A, {

    constructor: function(){ console.log("B"); }

  });



  var C = declare(B, {

    constructor: function(){ console.log("C"); }

  });



  new C();

});