// PATH to rollover images:
var rollover_path = "images/masthead/"
// IMAGE FILE NAMES within the above-named directory:
var rollover_images = [
	"nav_home", "nav_home_off.gif", "nav_home_over.gif",
	"nav_background", "nav_background_off.gif", "nav_background_over.gif",
	"nav_takeaction", "nav_takeaction_off.gif", "nav_takeaction_over.gif",
	"nav_news", "nav_news_off.gif", "nav_news_over.gif",
	"nav_events", "nav_events_off.gif", "nav_events_over.gif",
	"nav_supporters", "nav_supporters_off.gif", "nav_supporters_over.gif",
	"nav_aboutus", "nav_aboutus_off.gif", "nav_aboutus_over.gif"
]
// PRELOAD the images:
var preload=[]
var pre_name={}
for (var n=0; n<rollover_images.length; n++)
if (n%3!=0) {
	preload[n] = new Image()
	preload[n].src = rollover_path + rollover_images[n]
}
else pre_name[rollover_images[n]] = n


// WINDOW ONLOAD event to set the 'current page' rollover:
var currentPageTab = 0
var currentPageTabs = [
	"nav_home_on.gif", "nav_background_on.gif", "nav_takeaction_on.gif", "nav_news_on.gif",
	"nav_events_on.gif", "nav_supporters_on.gif", "nav_aboutus_on.gif"
]
function setCurrentPageTab(n) {
	var idx = pre_name[n]
	var e = document.getElementsByTagName('img')
	var iA = new Image(); iA.src = rollover_path + rollover_images[idx+1]
	var iB = new Image(); iB.src = rollover_path + rollover_images[idx+2]
	
	currentPageTab = idx
	for (var n=0; n<e.length; n++)
	if ((e[n].src == iA.src) || (e[n].src == iB.src))
	e[n].src = rollover_path + currentPageTabs[idx/3]
}


// MOUSEOVER & MOUSEOUT EVENTS:
function mOver(e) {
	e = mEvent(e)
	if (e.idx!=currentPageTab) if (e.img) e.img.src = preload[e.idx+2].src
}
function mOut(e) {
	e = mEvent(e)
	if (e.idx!=currentPageTab) if (e.img) e.img.src = preload[e.idx+1].src
}
function mEvent(e) {
	var eObj={}
	eObj.img = null
	if (e.firstChild) {
		if ((eObj.img=e.firstChild).nodeName.toLowerCase()!='img')
		if (eObj.img.nextSibling) eObj.img = eObj.img.nextSibling
	}
	eObj.idx = pre_name[e.name]
	return eObj
}

// Pop up window for send an email
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=1,menubar=0,resizable=1,width=340,height=400,left = 362,top = 184');");
}