function blink(speed) 
{
	if (speed) {
		if (document.all)
			setInterval("blink()", speed*1000);
		return;
	}
	var blink;
	if (document.all) {
		blink = document.all.tags("BLINK") 
		for (var i=0; i<blink.length; i++)
		blink[i].style.visibility = blink[i].style.visibility == "" ? "hidden" : "" 
	}
}