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

//override window alert
window.alert = function(message) {
	if (typeof(camControl) == 'object') {
		$('alertBox').className = 'lower';
	}
	$S('div#alertBox div.middel')[0].innerHTML = message;
	$('alertBox').style.visibility = 'visible';
}