Newchart = new Array (
0,26,36,1140,24);
var chartNum = 0;
var chartLength = Newchart.length - 1;

var delay = 4000;
var lock = false;
var run;
function chgchart(direction) {
 if (document.images) {
  chartNum = chartNum + direction;
  if (chartNum > chartLength) {
   chartNum = 0;
  }
  if (chartNum < 0) {
   chartNum = chartLength;
  }
  chart(Newchart[chartNum]);
  }
 }
function auto() {
 if (lock == true) {
  lock = false;
  window.clearInterval(run);
 }
 else if (lock == false) {
  lock = true;
  run = setInterval("chgchart(1)", delay);
  }
 }

function stop() {
 if (lock == true) {
  lock = false;
  window.clearInterval(run);
 }
}

auto();

function chart(stock) {
 document.chart_image.src="http://free-et.kbcequitas.hu/freET.cgi?step1=grafikon&style=Style3&craz="+stock+"&thumb=1";
}