var headline_count;
var headline_interval;
var old_headline = 0;
var current_headline=0;

function headline_rotate() {
  current_headline = (old_headline + 1) % headline_count; //remainder will always equal old_headline until it reaches headline_count - at which point it becomes zero. clock arithmetic
  $("div.headline:eq(" + old_headline + ")").animate({top: -205},"slow", function() {
    $(this).css('top','210px');
    });
  $("div.headline:eq(" + current_headline + ")").show().animate({top: 5},"slow");  
  old_headline = current_headline;
}