Best Way Of Handling Javascript Within Custom Controls?

In ASP.Net I have a few custom controls I've made. I utilized jQuery where it helped also. Well, one problem I have now(with obvious, but "bad" workarounds) is that for each user control I need to execute some code from within pageLoad($(document).ready will not work with update panels). Well so now my problem. I need to have two custom controls attach to the pageLoad event. What would be the best way of doing this? I can't just do

old_pageLoad=pageLoad
pageLoad=function(){... old_pageLoad();}

because these custom controls can be used more than once on a page and the script needs to run for every single instance of the control, plus what if I had 3 different custom controls on the page? the only method I've come up with is something like this which seems super hackish:

old_pageLoad_<%= MyStaticClass.GetUniqueID() %>=pageLoad;
pageLoad=function(){... old_pageLoad_<%= MyStaticClass.GetUniqueID() %>();}

Are there any better ways of handling function conflicts like this? I have also seen this MSDN article but what it suggests doing seems worse to me than what I am currently doing.