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POHow to create listeners with javascript
 

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    <p>I need to create a main class <code>animal</code>, then have two sub classes inherit properties from <code>animal</code> which are <code>cat</code> and <code>dog</code>, then I was to make multiple objects (multiple cat's and dog's) inherit from the class <code>cat</code> and <code>dog</code> (I read it's not really a class but it behaves as a class).</p> <p>The multiple objects (cat1, mycat, tomcat, dog1, mydog, topdog) need to be able to talk and listen to each other. When talking I would have them just alert or print a text line. What I am having trouble with is the listening part. I want the individual myDog to print out "dog heard cat" when myCat makes a sound. This is the code I have so far.</p> <pre><code>var animal = function (name, sound, listen) { var f = 0; this.name = name; // this.prop means prop is public var. this.sound = sound; this.listen = listen; this.makesound = function () { alert(this.sound); } this.listen = function () { alert(this.name + "heard that"); } return this; }; /*--------------- inheritance -----------------------------------*/ var cat = function () { this.name = name; this.sound = 'meow'; return this; }; cat.prototype = new animal(); function dog(name) { dog.sound = 'woof'; dog.name = name; return this; }; dog.prototype = new animal(); /*-------- different kinda dogs/cats ----------------------------*/ var myCat = new cat(); var myDog = new dog(); var tomCat = new cat(); var bigDog = new dog(); /*-----------------------*/ </code></pre> <p>I think I'm supposed to use an <code>if</code> statement, I heard I can use like a <code>if (callback) callback{}</code> but my attempts to implement something like that are failing. I'm BRAND new to javascript only been learning it last couple days. Any help or assistance would be really appreciated.</p>
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    1. CODo all animals hear when another animal makes a sound or does an animal make a sound for a specific animal to hear?
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