DOMReady.js

// with jQuery
$(document).ready(function(){ /* ... */ });
// shorter jQuery version
$(function(){ /* ... */ });
// without jQuery (doesn't work in older IEs)
document.addEventListener('DOMContentLoaded', function(){
// your code goes here
}, false);
// and here's the trick (works everywhere):
r(function(){
alert('DOM Ready!');
});
function r(f){/in/.test(document.readyState)?setTimeout('r('+f+')',9):f()}