function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(function(){
        var newsletter_registration = document.getElementById('newsletter_registration');
        newsletter_registration.onsubmit = function(){
			return doSubmit();
		}
});