Q1645 How can I make an image blink on and off a specified number of times?

<script language="JavaScript"><!--
var onOrOff= 'on';
var rate = 500; // blinks every half second

function blinkImage() {
   if (onOrOff == 'on') onOrOff = 'off';
   document.images['myImage'].src = 'myimage' + onOrOff + '.gif';
   times--;
   if (times <= 0) return;
   setTimeout('blinkImage()',rate);
}

var times = 3;
setTimeout('blinkImage()',rate);
//--></script>