var preloadedNav = false;

var ZOOM_SiteRoot="";

var section="index";


messages=new Array();

messages['home']="Start here to learn how to lead science activities.";
messages['try']="Prepare to lead by first trying an activity.";
messages['learn']="Explore video showing 5 easy steps for leading activities.";
messages['wrap']="Take the plunge! You're ready to lead science activities with kids.";
messages['resources']="Find activities, field trip ideas, an event-planning guide, training tools, and more.";
messages['index']="Welcome to ZOOMsci Training";

var ie4=(document.all&&!document.getElementById?1:0);
var ns4=(document.layers?1:0);
var dom=(document.getElementById?1:0);



function newImage(arg) {
if (document.images) {
ret=new Image();
ret.src=arg;
return ret;
}
}

function preloadPop() {

ZOOM_SiteRoot="../";
close_over=newImage(ZOOM_SiteRoot + "images/nav/close_over.gif");
//resources_over=newImage(ZOOM_SiteRoot + "images/nav/resources_over.gif");
preloadedNav=true;
}

function preloadNav(sect) {

window.name="main";
if (document.images)
{
var ZOOM_SiteRoot="";
home_over=newImage(ZOOM_SiteRoot + "images/nav/home_over.gif");
try_over=newImage(ZOOM_SiteRoot + "images/nav/try_over.gif");
learn_over=newImage(ZOOM_SiteRoot + "images/nav/learn_over.gif");
wrap_over=newImage(ZOOM_SiteRoot + "images/nav/wrap_over.gif");
resources_over=newImage(ZOOM_SiteRoot + "images/nav/resources_over.gif");
preloadedNav=true;
}

section=sect;


if (!dom && !ie4 && ns4)
{
id='descript';
//msg=messages[section];
msg="";
	with (document[id].document) {
		open();
		write('<span class="tagline">' + msg + '</span>');
		close();
	}

}

}



function doshow(place) {

var msg=messages[place];
var id='tagline';

if (dom) document.getElementById(id).innerHTML=msg;
else if (ie4) document.all[id].innerHTML=msg;
else if (ns4) { 
// it's hopeless unless it's an absolutely positioned element.

id='descript';
	with (document[id].document) {
		open();
		write('<span class="tagline">' + msg + '</span>');
		close();
	} 
/*
id='descript';
 				document[id].document.open();
                document[id].document.write('<span class="tagline">' + msg + '<\/span>');
                document[id].document.close();

                document.descript.document.open();
                document.descript.document.write('<span class="tagline">' + msg + '<\/span>');
                document.descript.document.close();
	*/
}
	window.status = msg;
	return true;

}

function unshow(place) {
msg="&nbsp;";
var id='tagline';

if (dom) document.getElementById(id).innerHTML=msg;
if (ie4) document.all[id].innerHTML=msg;
if (ns4) { 
// it's hopeless unless it's an absolutely positioned element.

id='descript';
	with (document[id].document) {
		open();
		write('<span class="tagline">' + msg + '</span>');
		close();
	} 
}
	window.status = '';
	return true;
}


function rollin(name) {
if (document.images && preloadedNav==true) {
document.images[name].src =  ZOOM_SiteRoot + "images/nav/" + name + "_over.gif";
return doshow(name);
}
}


function rollout(name,keep) {
if (document.images && preloadedNav==true) {
document.images[name].src = ZOOM_SiteRoot + "images/nav/" + name + keep + ".gif";
return unshow(section);
}

}


function rollinplain(name) {
if (document.images && preloadedNav==true) {
document.images[name].src =  ZOOM_SiteRoot + "images/nav/" + name + "_over.gif";
}
}


function rolloutplain(name,keep) {
if (document.images && preloadedNav==true) {
document.images[name].src = ZOOM_SiteRoot + "images/nav/" + name + keep + ".gif";
}

}

function rollvid(name)
{
if (document.images && preloadedNav==true) {
document.images[name].src =  ZOOM_SiteRoot + "images/nav/" + name + "_over.gif";
}
}

function rollvidout(name)
{
if (document.images && preloadedNav==true) {
document.images[name].src =  ZOOM_SiteRoot + "images/nav/" + name + "_off.gif";
}
}



function sitemap_show(msg) {

	if (document.divs && document.descript != null) {
		document.descript.document.open();
		document.descript.document.write('<span id="desc" name="desc"><font color="' + color + '">' + msg + '<\/font><\/span>');
		document.descript.document.close();
		
		document.descript2.document.open();
		document.descript2.document.write('<span id="desc2" name="desc2"><font color="' + color + '">' + msg + '<\/font><\/span>');
		document.descript2.document.close();
	}
	else {
		if (document.all) {
			desc.innerText = msg;
			desc.style.color = color;
			
			desc2.innerText = msg;
			desc2.style.color = color;
		}
	}
	window.status = msg;
	return true;
}

function sitemap_unshow() {

	if (document.divs && document.descript != null) {
		document.descript.document.open();
		document.descript.document.write('');
		document.descript.document.close();
		
		document.descript2.document.open();
		document.descript2.document.write('');
		document.descript2.document.close();
	}
	else {
		if (document.all) {
			desc.innerText = '.';
			desc.style.color = '#000000';
			
			desc2.innerText = '.';
			desc2.style.color = '#000000';
		}
	}
	window.status = '';
	return true;
}