I had to implement custom events on JQuery found this kind of working for what I needed it to do. Not so sure if this was the most ideal way to do it, but would be worth getting your views on it.

$(document).ready(function() {
	$(document).bind('custom-event', doSomething);
	$(document).bind('custom-event', doAnotherthing);

	$('#some_name').click(function() {
		$(document).trigger('custom-event', ['foo1', 'foo2']);
	});

});

function doSomething(e, param1, param2) {
	console.log(arguments);
	console.log('doing something..');
}
function doAnotherthing(e, param1, param2)
{
	console.log(arguments);
	console.log('doing another thing..');
}

I resolved this problem by writing a bookmarklet which will allow you to do that easily. The details are available here. This has been tested on firefox 2.x, safari 3.1 and IE 6/7. Please post any bugs that you find. If you do the view source of the file you can see the code as well.

1. From the Tools menu, select Internet Options.
2. Select the Security tab.
3. Click the Custom Level button.
4. Scroll to the Scripting section.
5. Under Active Scripting, select the Prompt option (usually i would select enable/disable which took time)
6. Click OK.
7. Click the Yes button.
8. Click OK.On your toolbar, click the Refresh button.

So now every time you reload your page, you get the following prompt

and you can choose to allow or disallow javascript.