加入函数绑定的函数柯里化

function curry(fn, context) {
    var args = Array.prototype.slice.call(arguments, 2);
    return function() {
        var innerArgs = Array.prototype.slice.call(arguments);
        var finalArgs = args.concat(innerArgs);
        return fn.apply(context, finalArgs);
    };
}
function bind(fn, context) {
    return function() {
        return fn.apply(context, arguments);
    };
}

//使用方法
var handler = {
    message: "Event handler",
    handleClick: function(name, event) {
        console.log(this.message + ":" + name + ":" + event.type);
    }
};

var btn = document.getElementById("my-btn");
EventUtil.addHandler(btn, "click", bind(handler.handleClick, handler, "my-btn"));