Event (on)change issue

I am using prototype's framework.
I wish to fire it upon changed value in, eg: select element, if option changes.

Code:

---

    Event.observe(document.body, 'change', function(event) {
    alert('I AM EVENT');
    });

---

Doesn't work in IE7, but does in all other browsers.
Why?

I'm not exactly sure as to why that won't work. I have had trouble in the past with document.body. Have you tried document.getElementsByTagName('body')[0] instead?

Well, that doesn't work in IE7 as well

I would suggest you contact prototype then. It could be a bug.

Ok, I will.