Rework the special events interface to add handle and trigger hooks. Modify IE...

Rework the special events interface to add handle and trigger hooks. Modify IE change/submit special events to take advantage of them. Rewrite mouseover/enter code as special events rather than inline code. In the event unit test, set a tabindex on the div element and focus it first to justify a legitimate blur event.

test/unit/event.js

@@ -1457,6 +1457,9 @@ test(".live()/.die()", function() {
 
 	jQuery("#nothiddendiv div").die("click");
 
+	// div must have a tabindex to be focusable
+	jQuery("#nothiddendiv div").attr("tabindex", "0")[0].focus();
+
 	jQuery("#nothiddendiv div").live("blur", function(){
 		ok( true, "Live div trigger blur." );
 	});