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