/* Rotator */
var position = 0;
var goal = 0;
var auto = 0;
var slideSize = 560;

function slide(target) {
if(position == goal) {
 slider = document.getElementById('slideshow').getElementsByTagName('ul')[0];
 end = (slider.getElementsByTagName('li').length * slideSize);
 if(target == 'next') {
 target = position + slideSize;
 if(target >= end) {
 target = 0;
 }
 }

 if(target == 'prev') {
 target = position - slideSize;
 if(target < 0) {
 target = end - slideSize;
 }
 }
 goal = target;
 original_difference = goal - position;
 breaking_point = Math.abs(original_difference) / 5;
 speed = Math.round(original_difference / 20);

 document.getElementById('slide_menu_' + Math.round(position / slideSize)).src='../images/slider_prik.gif';
 document.getElementById('slide_menu_' + (target / slideSize)).src='../images/slider_prik_on.gif';

 smooth_move();
 }
}

function smooth_move() {
if(position != goal) {
difference = goal - position;
distance = Math.abs(difference);
if(distance <= breaking_point) {
move = Math.round(speed * (distance / breaking_point));
if(move == 0) {
if(difference > 0) {
 move = 1;
 } else {
move = -1;
 }
}
position += move;
} else {
position += speed;
}

slider.style.right = position + 'px';
setTimeout("smooth_move();", 25);
  }
}

function autoSlide() {
if(auto == 1) {
slide('next');
setTimeout("autoSlide();", 9000);
 }
}

function startAutoSlide() {
auto = 1;
setTimeout("autoSlide();", 9000);
}

function stopAutoSlide() {
auto = 0;
}

function setSlideWidth(size) {
slideSize = size;
}