var i = 0;
function doblink(obj)
{
	if (obj && obj.style)
		if (obj.style.visibility != "hidden")
			obj.style.visibility = "hidden";
		else
			obj.style.visibility = "visible";
}
function mainblink()
{
	var list = document.getElementsByTagName("SPAN");
	for (var j = 0; j < list.length; j++)
		if (list[j].id.match(/^blink/))
			doblink(list[j]);
	if (++i < 8)
		setTimeout("mainblink();", 750);
}