dojo事件传递自定义参数

var exampleClass = function(){
    this.counter;
    this.sum=function(num1,num2){
        var result = num1+num2;
        //计算结果result即为onSum事件的参数
        this.onSum(result);
    },
    this.onSum=function(result){
        alert(result);
    }
};

function print(fName, args) { 
    var message = "In " + fName + "; the arguments are: " 
    dojo.forEach(args, function(args) { 
     message += args.toString() + " "; 
    }) ; 
    document.write(message+"<br>"); 
};

var eventhandlers = function(){   
    this.handler=function(){
        print("handler",arguments);
    }
};

var exampleObj = new exampleClass();
var events = new eventhandlers();

var h3 = dojo.connect(exampleObj, "onSum",events,"handler");
exampleObj.sum(1,2);