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