求助：一个初学者的javascript问题

这个问题应该很容易，但由于我是编程新手，尤其是javascript语言，所以我无法弄清楚。 假设我有以下javascript代码：

var InjectClientValue = Class.create();


InjectClientValue.prototype = {
    initialize: function( sourceElement, eventElement, updateElement ) {
        this.sourceElement = $(sourceElement);
        this.element = $(eventElement);
        this.updateElement =$(updateElement)
        this.element.observe('click',this.onClick.bindAsEventListener(this));
    },
    onClick: function(event) {
        new Ajax.Request(this.element.href+"/"+this.sourceElement.value, {
            method:'get', 

            onSuccess: function(transport) {

                //How do I access the instance variable updateElement in InjectClientValue_
            //updateElement.update(transport.responseJSON.content);
            }
        });
        event.stop();

    }
    }

我需要通过Ajax.Request的onSuccess访问initialize中的变量updateElement——该怎么办？

Try this:

onClick: function(event) {
    var thisVariable = this;

    new Ajax.Request(this.element.href+"/"+this.sourceElement.value, {
        method:'get', 

        onSuccess: function(transport) {
            thisVariable.updateElement.update(transport.responseJSON.content);
        }

Since you already have an instance of the class as "InjectClientValue," you can use that to reference the object and call methods on it.

onClick: function(event) {
    new Ajax.Request(this.element.href+"/"+this.sourceElement.value, {
        method:'get', 
        onSuccess: function(transport) {
            InjectClientValue.updateElement.update(transport.responseJSON.content);
        }