function categorydisplay(category)
{
	var image_src;
	var title;

	image_src = document.getElementById('quizselection').src;	
	image_src = image_src.substr(0, (image_src.lastIndexOf('/')+1));
	
	document.getElementById('quizselection').src = image_src + 'option_' + category + '.gif';
	
	switch(category)
	{
		case "film"				: title = "Film Trivia"; break;
		case "music"			: title = "Music Trivia"; break;
		case "generalknowledge"	: title = "General Knowledge Trivia"; break;
		case "sport"			: title = "Sport Trivia"; break;
		case "entertainment" 	: title = "Entertainment Trivia"; break;
	}
	document.getElementById('quiztitle_container').innerHTML = '<h1>' + title + '</h1>';
}