Weird DOM behavior

Weird DOM behavior

Hello everyone.
I have a big problem.

I have an html page, and in a class called 'the_content' I want to put this:
<div class="class_class">HELLO</div>

So what I did is:
$(".the_content").html('<div class="class_class">HELLO</div>');

Which is fine, BUT when writing:
$("class_class").click(functuin (){
//alert("something");
});

It won't alert! It seems like the browser doesn't see this class at all!
Why is this happening? How can I fix it?
Thanks, Leon.