function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = func; } else { window.onload = function() { oldonload(); func(); } } }
To add an event:
addLoadEvent(nameOfSomeFunctionToRunOnPageLoad); addLoadEvent(function() { /* more code to run on page load */ });
Tested on IE 5, 5.5 and 6 for Windows; IE 5 and Safari for Mac; Opera 7.5 and FireFox on Mac. Fails on Opera 6.