var interactedNav = false;
function navShow(num) {
	interactedNav = true;
	navHideAll();
	theId = 'nav-'+num;
	var el = document.getElementById(theId);
	if (window.ActiveXObject) {
		el.style.filter = "alpha(opacity=100)";
	} else {
		el.style.opacity=1.0;
	}
}
function navHide(num) {
	interactedNav = true;
	theId = 'nav-'+num;
	var el = document.getElementById(theId);
	if (window.ActiveXObject) {
		el.style.filter = "alpha(opacity=15)";
	} else {
		el.style.opacity=.15;
	}
}
function navHideAll() {
	interactedNav = true;
	for (i=1; i<=5; i++) {
		theId = 'nav-'+i;
		var el = document.getElementById(theId);
		if (window.ActiveXObject) {
			el.style.filter = "alpha(opacity=15)";
		} else {
			el.style.opacity=.15;
		}
	}
}
function fadeNeutron() {
	var el = document.getElementById('nav-1');
	if (el && !interactedNav) { new Effect.Opacity('nav-1', {duration:2, from:1.0, to:0.15}); }
}
function pauseIt(ms) {
	var date = new Date();
	var curDate = null;
	do { curDate = new Date(); }
	while(curDate-date < ms);
}