img=new Array()
imgon=new Array()
imgoff=new Array()
layeron=null
browser=0

function init()
{
	if (document.images) {
		if (document.layers) browser=3 // Netscape 4+
		else if (document.all) browser=2 // Explorer 4+
		else browser=1 // Netscape 3
	} else browser=0 // Explorer 3
}

function preload(p,s,n)
{
	for(i=1; i<=n; i++) {
		img[i]=new Image()
		img[i].src='../images/'+p+i+s
	}
}

function swap(i,n,l)
{
	if (l && browser == 3) eval(netname(l)+'document[\'img\'+n].src=img[n].src')
	else if (browser) document['img'+i].src=img[n].src
}

function preloadx(p,s,n)
{
	if (n) {
		var d=imgon.length?imgon.length-1:0
		for(i=1; i<=n; i++) {
			imgon[i+d]=new Image()
			imgon[i+d].src='../images/'+p+i+'x'+s
			imgoff[i+d]=new Image()
			imgoff[i+d].src='../images/'+p+i+s
		}
	} else {
			var d=imgon.length?imgon.length:1
			imgon[d]=new Image()
			imgon[d].src='../images/'+p+'x'+s
			imgoff[d]=new Image()
			imgoff[d].src='../images/'+p+s
	}
}

function on(n,l)
{
	if (l && browser == 3) eval(netname(l)+'document[\'img\'+n].src=imgon[n].src')
	else if (browser) document['img'+n].src=imgon[n].src
}

function off(n,l)
{
	if (l && browser == 3) eval(netname(l)+'document[\'img\'+n].src=imgoff[n].src')
	else if (browser) document['img'+n].src=imgoff[n].src
}

function netname(l)
{
	for(i=1,a='';i<=l.length;i++) {
		a+='document.layers.'+l.substring(0,i)+'.'
	}
	return a
}

function showlayer(l)
{
	switch(browser) {
		case 3:
		document.layers.x.visibility = 'visible'
		document.layers.x.document.layers[l].visibility = 'visible'
		break
		case 2:
		document.all.x.style.visibility = 'visible'
		document.all[l].style.visibility = 'visible'
	}
	if (layeron) hidelayer(layeron)
	layeron=l
}

function hidelayer(l)
{
	switch(browser) {
		case 3:
		document.layers.x.visibility = 'hidden'
		document.layers.x.document.layers[l].visibility = 'hidden'
		break
		case 2:
		document.all.x.style.visibility = 'hidden'
		document.all[l].style.visibility = 'hidden'
	}
	layeron=null
}

function chgframes(menu, texto)
{
	if (parent.window.frames.frame.location.href.indexOf(menu) == -1) {
		parent.window.frames.frame.location.href = menu
	}
	if (parent.window.frames.texto.location.href.indexOf(texto) == -1) {
		parent.window.frames.texto.location.href = texto
	}
}