var b_timer = null; // blink timer
var b_on = true; // blink state
var blnkrs = null; // array of spans

function blink() {
var tmp = document.getElementsByTagName("span");
if (tmp) {
	blnkrs = new Array();
	var b_count = 0;
	for (var i = 0; i < tmp.length; ++i) {
		if (tmp[i].className == "blink") {
			blnkrs[b_count] = tmp[i];
			++b_count;
		}
	}
	// time in m.secs between blinks
	// 500 = 1/2 second
	blinkTimer(1000);
	}
}

function blinkTimer(ival) {
	if (b_timer) {
		window.clearTimeout(b_timer);
		b_timer = null;
	}
	blinkIt();
	b_timer = window.setTimeout('blinkTimer(' + ival + ')', ival);
}

function blinkIt() {
	for (var i = 0; i < blnkrs.length; ++i) {
		if (b_on == true) {
			blnkrs[i].style.visibility = "hidden";
		}
		else {
			blnkrs[i].style.visibility = "visible";
		}
	}
	b_on =!b_on;
}