if (document.images) {
	nav1on = new Image(); nav1on.src = "http://amazon.jagflyhosting.com/images/map/mapBrazil-xingu.jpg";
	nav2on = new Image(); nav2on.src = "http://amazon.jagflyhosting.com/images/map/mapBrazil-tumucumaque.jpg";
	nav3on = new Image(); nav3on.src = "http://amazon.jagflyhosting.com/images/map/mapBrazil-sete-de-setembro.jpg";
	nav4on = new Image(); nav4on.src = "http://amazon.jagflyhosting.com/images/map/mapBrazil-medio-rio-negro.jpg";
	navoff = new Image(); navoff.src = "http://amazon.jagflyhosting.com/images/map/mapBrazil.jpg";
}

function rollOn(img1,img2,text){
	str = "window.status = '" + text + "'";
	if (document.all) setTimeout(str,5); // this is a hack to fix bug in IE on PC
    else window.status = text;
	if (document.images) {
		document.navs.src=eval(img1 + "on.src");
		document.target.src=eval(img2 + "on.src");
	}
}

function rollOff(){
    window.status = "";	
	if (document.images) {
		document.navs.src=navoff.src;
		document.target.src=targetoff.src;
	}
}