/* ------------ sequential + random access nav ------------ */

var current = 1;
var sequential = true;

function updateCurrent() {
  (sequential)? document.getElementById('placeh'+current).style.backgroundColor = '' : sequential = true;
  current = (++current != maxcurrent)? current % maxcurrent : maxcurrent;
  document.getElementById('placeh'+current).style.backgroundColor = '#FFF';
}

function setCurrent(x) {
  document.getElementById('placeh'+current).style.backgroundColor = '';
  current = x-1;
  sequential = false;
}