function scroller(duration,scrollrate){
	 var headline_count;
	 var headline_interval;
	 var old_headline = 0;
	 var current_headline = 0;
	
	headline_count = $("div.headline").size();
	$("div.headline:eq("+current_headline+")").css('top','0px');
	
	headline_interval = setInterval(headline_rotate,duration); //time in milliseconds
	$('#scrollup').hover(function() {
		clearInterval(headline_interval);
	}, function() {
		headline_interval = setInterval(headline_rotate,duration); //time in milliseconds
	});
 
	function headline_rotate() {
		current_headline = (old_headline + 1) % headline_count; 
		$("div.headline:eq(" + old_headline + ")").animate({top: -150},scrollrate, function() {
			$(this).css('top','336px');
		});
		$("div.headline:eq(" + current_headline + ")").show().animate({top: 0},scrollrate);  
		old_headline = current_headline;
	}
}