// Detect IE 4
isIE4 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) > 3);

// This function pulsates the glow
function doGlow(strength) {
// If the strength it less than 10,
if (strength < 10) {
// then increase it by one,
strength += 1;
}
// otherwise
else {
// decrease it by one.
strength -= 1;
}
// Give the values of the variable to the filter property,
document.all.glowText.style.filter = "glow(color=#ff0000, strength=" + strength + ")";
// Finally, wait 10 milliseconds and start it all again.
setTimeout("doGlow(" + strength + ")", 100);
}

// Run the function for the first time
if (isIE4) doGlow(10);