function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = func; } else { window.onload = function() { if (oldonload) { oldonload(); } func(); } } } function dccLoad() { var rotateOne = function() { window.alert('first'); } window.setTimeout("rotateOne()", 3000); } addLoadEvent(dccLoad);