Why does this not work?

 <input type=file id=kmlFiles2 multiple onchange=function(){alert('why does this not work')}()>

chrome gives me an error,
Uncaught SyntaxError: Unexpected token (.

Firefox tells me SyntaxError: function statement requires a name.

But this does work?

 <input type=file id=kmlFiles2 multiple onchange=alert('but this does work')>

http://jsfiddle.net/ewzyV/

I am asking because I was was trying to use and MVC framework that injects code into the onchange event.