var nick_quotes = new Array('angry_1','angry_2','angry_3','angry_4','angry_5','angry_6','angry_7','angry_8','angry_9','angry_10','angry_11','angry_12','angry_13','angry_14','angry_15'); 
var number; 

function getRandomQuote() { 
	number = Math.random(); 
	number = Math.round(number * 15); 
	
	if (number == 0) { 
		getRandomQuote(); 
	} 
	else { 
		document.images["random_quote"].src = "http://www.penguin.co.uk/static/packages/uk/articles/hornby/gifs/angry/" + nick_quotes[number] + ".gif";
	}
}