function getRefToDiv(divID) {
    if( document.layers ) { /*Netscape layers */
        return document.layers[divID]; }
    if( document.getElementById ) { /*DOM; IE5, NS6, Mozilla, Opera*/
        return document.getElementById(divID); }
    if( document.all ) { /*Proprietary DOM; IE4 */
        return document.all[divID]; }
    if( document[divID] ) { /*Netscape alternative */
        return document[divID]; }
    return false;
}

function SwapImageRio() {
  r.src="/local/images/template/button_rio_h.gif";
}
function SwapImageRioBack() {
  r.src="/local/images/template/button_rio.gif";
}

function SwapImageAustralia() {
  a.src="/local/images/template/button_australia_h.gif";
}
function SwapImageAustraliaBack() {
  a.src="/local/images/template/button_australia.gif";
}

function SwapImageXique() {
  x.src="/local/images/template/button_xique_h.gif";
}
function SwapImageXiqueBack() {
  x.src="/local/images/template/button_xique.gif";
}

function SwapImageZodiac() {
  z.src="/local/images/template/button_zodiac_h.gif";
}
function SwapImageZodiacBack() {
  z.src="/local/images/template/button_zodiac.gif";
}

var r;
var a;
var x;
var z;

window.onload = function() {
	r = getRefToDiv("rio_img");
	a = getRefToDiv("australia_img");
	x = getRefToDiv("xique_img");
	z = getRefToDiv("zodiac_img");
	}