// JavaScript Document
function assignBlink(el) {
	el.runtimeStyle.visibility = "visible";
	setInterval(function() {
	el.runtimeStyle.visibility = (el.currentStyle.visibility == "visible") ? "hidden": "visible";
	}, 750);
}

function toggleExhibits(year) {
    var node = document.getElementById(year);
	node.style.display = node.style.display=="none"?"block":"none";
}