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