[jQuery] Double-click and toggle

Hello,
I've been trying to figure out how to combine double-click and toggle
but haven't had any luck. Here's what I have so far:
$("li").dblclick(function() {
$(this).toggle(function() {
$(this).doSomething();
}, function() {
$(this).backToNormal();
});
});
Any ideas why this doesn't work?