<SCRIPT LANGUAGE="JavaScript">
<!--
lay(30)

// set index of lamp to start animation
var current = 0

// set speed (pause in milliseconds between each movement)
var speed = 100

function lay(num) {
// assign "greater than" character to variable
var gt = unescape("%3e")

// open form
document.write("<FORM NAME='animation'" + gt)

// use loop to lay radio buttons down (all buttons in same group)
for (var i = 0; i < num; ++i) {
document.write("<INPUT TYPE='radio' NAME='lamps'" + gt)
}

// close form
document.write("</FORM" + gt)
}

function animate() {
// click next radio button
document.animation.lamps[current].click()

// if radio button is the last one reset variable to 0 (otherwise increment)
current = (current == document.animation.lamps.length - 1) ? 0 : ++current

// recursive call after speed milliseconds
timerID = setTimeout("animate()", speed)
}

// -->
</SCRIPT>

ВОТ ЭТОТ КОД РАБОТАЕТ ПОСМОТРИТЕ ПРИМЕР!