Registering SharePoint Event Receivers that are already registered

In my opinion, use event receivers, as these follow the item rather than the list. You still need to enable the content type for the receiving list, but this approach is a lot easier than updating and deleting workflows in lists based on the presence or absences of certain content types.

However, why not combine the approaches? Have the content type event receiver deal with the content type specific activities and let the lists handle any list specific activities. Event receivers are cheap and flexible.

.b

You might consider using an external javascript library such as jQuery or prototype, etc.

For example, in jQuery, you might try (untested code!!)

$("window").bind("resize", "myFunctionName");

jQuery docs: http://docs.jquery.com/Events/bind

info on using jQuery in SharePoint: http://weblogs.asp.net/jan/archive/2008/11/20/sharepoint-2007-and-jquery-1.aspx

EDIT: If you'd rather not use an external library, on document load run a function that attaches another function to the resize event. Something like:

_spBodyOnLoadFunctionNames.push(function() {
    window.onresize = function() {
         /* resize code here */
    }});

You could of course use named functions.

EDIT 2: Defining your events as above (window.onresize = ) is only good for one event. So if a multiple event handlers are specified the same way for the same event on the same page, whichever one is specified last "wins." The "correct" way to do it is to attach an event handler, and the easiest way to accomplish this is through a library, as they handle cross-browser differences transparently.