if (document.images) {
	etusivuN = new Image();
	etusivuN.src = "gfx/head_etusivu.gif";
	etusivuR = new Image();
	etusivuR.src = "gfx/head_etusivu_on.gif";
	
	saatioN = new Image();
	saatioN.src = "gfx/head_saatio.gif";
	saatioR = new Image();
	saatioR.src = "gfx/head_saatio_on.gif";
	
	julkaisutN = new Image();
	julkaisutN.src = "gfx/head_julkaisut.gif";
	julkaisutR = new Image();
	julkaisutR.src = "gfx/head_julkaisut_on.gif";
	
	tutkimusN = new Image();
	tutkimusN.src = "gfx/head_tutkimus.gif";
	tutkimusR = new Image();
	tutkimusR.src = "gfx/head_tutkimus_on.gif";
	
	ajankohtaistaN = new Image();
	ajankohtaistaN.src = "gfx/head_ajankohtaista.gif";
	ajankohtaistaR = new Image();
	ajankohtaistaR.src = "gfx/head_ajankohtaista_on.gif";
	
	linkitN = new Image();
	linkitN.src = "gfx/head_linkit.gif";
	linkitR = new Image();
	linkitR.src = "gfx/head_linkit_on.gif";
	
	// English
	homeN = new Image();
	homeN.src = "gfx/en_head_etusivu.gif";
	homeR = new Image();
	homeR.src = "gfx/en_head_etusivu_on.gif";
	
	foundationN = new Image();
	foundationN.src = "gfx/en_head_saatio.gif";
	foundationR = new Image();
	foundationR.src = "gfx/en_head_saatio_on.gif";
	
	publicationsN = new Image();
	publicationsN.src = "gfx/en_head_julkaisut.gif";
	publicationsR = new Image();
	publicationsR.src = "gfx/en_head_julkaisut_on.gif";
	
	researchN = new Image();
	researchN.src = "gfx/en_head_tutkimus.gif";
	researchR = new Image();
	researchR.src = "gfx/en_head_tutkimus_on.gif";
	
	currentIssuesN = new Image();
	currentIssuesN.src = "gfx/en_head_ajankohtaista.gif";
	currentIssuesR = new Image();
	currentIssuesR.src = "gfx/en_head_ajankohtaista_on.gif";
	
	linksN = new Image();
	linksN.src = "gfx/en_head_linkit.gif";
	linksR = new Image();
	linksR.src = "gfx/en_head_linkit_on.gif";
}

function on(img) {
	var foo = eval(img+"R");
	document.images[img].src = foo.src;
}

function off(img) {
	var foo = eval(img+"N");
	document.images[img].src = foo.src;
}

function tellAFriend() {
	var url = "tellafriend.php?pageurl=";
	url += escape(self.location.href);
	var w = 378;
	var h = 300;
	var left = (screen.width - w) / 2;
	var top = (screen.height - h) / 2;
	var newWin = window.open(url, "tellafriend", "directories=0, fullscreen=0, width=" + w + ", height=" + h + ", left=" + left + ",top=" + top + ", location=0, menubar=0, resizable=0, scrollbars=0, status=0, titlebar=0");
	newWin.opener = self;
	newWin.focus();
}

function kerroKaverille() {
	var url = "kerrokaverille.php?pageurl=";
	url += escape(self.location.href);
	var w = 378;
	var h = 300;
	var left = (screen.width - w) / 2;
	var top = (screen.height - h) / 2;
	var newWin = window.open(url, "kerrokaverille", "directories=0, fullscreen=0, width=" + w + ", height=" + h + ", left=" + left + ",top=" + top + ", location=0, menubar=0, resizable=0, scrollbars=0, status=0, titlebar=0");
	newWin.opener = self;
	newWin.focus();
}