[Rails] Coffee script events handling

Hi all,


Currently I'm working on a ruby on rails project and I have to say, I'm
loving all the neat conventions.

Now I would like to integrate some Javascript into my project, with the use
of Coffee script.

But I have to admit, I have little knowledge about Javascript, and even
less about Coffee script.

Having said that, I would still like to try to use it.


Anyway, what I want is this: I want a button on my webpage that, when
clicked, gives me an alert box.


What I would write in *HTML*:

<div id="test">

<button id="test_button">Test</button>

</div>


And in the included *JS* file:

window.onload = function() {

$("test_button").onclick = test_func;

}

function test_func(){

alert('it works!');

}


I tested this, and it does exactly what I want.


Now, the corresponding *HAML* code I'm using is:

.test

%button{:id => 'test_button'} Test


And in Coffee script:

test_func = -> alert 'it works!'

window.onload = -> $('test_button').onclick = test_func


This does create a button with the text 'Test' on there.

But when I try the code above, it does not preform any action..


I have the feeling it's because I'm unaware of some rails convention.

Can maybe somebody help me with my problem?


*Versions I'm using:*

- Ruby: 1.9.3p5
- Rails: 3.1.3
- Haml: 3.1.4
- Coffee-script: (2.2.0)

I hope this was enough information.

Please let me know if anything is unclear


Kind regards,


Ron