jQuery
$(document).ready(function(){});
$(window).load(function(){});
Introducing $(document).ready() | Learning jQuery
Prototype
document.observe("dom:loaded", function(){});
Event.observe( window, "load", function(){});
Prototype JavaScript framework: document.observe
Mootools
window.addEvent("domready", function(){});
window.addEvent("load", function(){});
Window Event: domready | MooTools Docs - Utilities/DomReady
Extjs
Ext.onReady(function(){});
Dojo
dojo.addOnLoad(function(){});
Introducing The Dojo Toolkit | Opera Developer Community
YUI
Y.on("domready", function(){});
Using the domready Event (Formerly onDOMReady) | YUI 3: Event
