Have this in your .js script:
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != ‘function’) {
window.onload = func;
} else {
window.onload = function() {
if (oldonload) {
oldonload();
}
func();
}
}
}
and put your your functions in the page header like this:
addLoadEvent(function() {
document.body.style.backgroundColor = ‘yellow’;
})
Learned this at : Simon Willison’s Weblog