function ExecuteFade(){
    var id = 'spotlightImage'
    if (document.getElementById(id) == null) return;
	opacity(id, 0, 100, 2500);
}

if (window.addEventListener)
window.addEventListener("load", ExecuteFade, false);
else if (window.attachEvent)
window.attachEvent('onload', ExecuteFade);
else if (document.getElementById)
window.onload=ExecuteFade;