Ran into a neat way to load and run custom javascript when an ADF page loads:

        <af:resource type="javascript">

          function onLoad() {   
           alert("I am running ! ");
          }
          //Script block
          if (window.addEventListener) {
            window.addEventListener("load", onLoad, false)
          } else if (window.attachEvent) {
             window.detachEvent("onload", onLoad)
             window.attachEvent("onload", onLoad)
          } else {
            window.onload=onLoad
          }
        </af:resource> 
 
Reference: http://docs.oracle.com/cd/E23943_01/webcenter.1111/e10148/jpsdg_pagelet.htm#BABGHCBF