function navOn(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/nav_" + imgDocID + "_on.gif";
	}
}

function navOff(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/nav_" + imgDocID + "_off.gif";
	}
}

function navOnSelect(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/nav_" + imgDocID + "_select_on.gif";
	}
}

function navOffSelect(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/nav_" + imgDocID + "_select_off.gif";
	}
}

function subnavOn(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/" + imgDocID + "_bar.gif";
	}
}

function subnavOff(imgDocID) {
	if (document.images[imgDocID].complete) {
		document.images[imgDocID].src = "images/spacer.gif";
	}
}

function openShakeWindow() {
window.open('shakin.html','Shakin','width=300,height=350,screenX=100,screenY=100,top=100,left=100,resizable=no,toolbar=no,scrollbars=no')
}

function shake(n) { 
	if (self.moveBy) { 
		for (i = 10; i > 0; i--) { 
		for (j = n; j > 0; j--) { 
			self.moveBy(0,i); 
			self.moveBy(i,0); 
			self.moveBy(0,-i); 
			self.moveBy(-i,0); 
			} 
		} 
	} 
}

function secondsOld() {
	var secs_per_min = 60;
	var mins_per_hour = 60;
	var hours_per_day = 24;
	var days_per_year = 365;
	var secs_per_day = secs_per_min * mins_per_hour * hours_per_day;
	var secs_per_year = secs_per_day * days_per_year;
	var agenumber = document.secondsage.yourage.value;
	alert("You are " + agenumber * secs_per_year + " seconds old.");
}

function scrollMessage(text) {
	msg = "Hi " + text + "! Welcome to GirlsGoTech.org."
	i = 0
	window.status = msg.substring(i,msg.length) + msg.substring(0,i-1)
	if (i < msg.length) {
		i++
	}
	else {
		i = 0
	}
}