JQuery :: Attaching Multiple Window Resize Events?

I've been reading forum posts (not just on this site) and unsuccessfully trying to apply the examples to what I'm doing for hours now. Can anyone help me do this correctly?

I need the browser window's resize event to trigger resizes on different objects on my page. The objects are added dynamically, so I can't just have one function to set it all up at the beginning, although so far that's the only way I know how to do it. I understand that using this method (below), that there can be only one such statement, but I need to add new functions to the resize event as I add new items to my page.

window.onresize = function(event) {
$('#main-tab-bar').tabs('resize'); //resize something
$('.aportal').portal('resize'); //resize something else
}

What is a cross-browser method for attaching multiple functions (like the two above) to the browser window resize event, where they aren't both done at the same time (like above)?