// HTML/JavaScript index button

if (document.images) {
	var indpic=new Image(24,25);
	indpic.src="img/ind.gif";
	var hindpic=new Image(24,25);
	hindpic.src="img/hind.gif";
	var recuarpic=new Image(35,35);
	recuarpic.src="img/recuar.gif";
	var hrecuarpic=new Image(35,35);
	hrecuarpic.src="img/hrecuar.gif";
	var avancarpic=new Image(35,35);
	avancarpic.src="img/avancar.gif";
	var havancarpic=new Image(35,35);
	havancarpic.src="img/havancar.gif";
	var internetpic=new Image(38,38);
	internetpic.src="img/terra.gif";
	var hinternetpic=new Image(38,38);
	hinternetpic.src="img/hterra.gif";
}

function on(img) {
	if (document.images) {
		if (img.substring(0,3)=='ind') document[img].src=hindpic.src;
		if (img=='avancar') document[img].src=havancarpic.src;
		if (img=='recuar') document[img].src=hrecuarpic.src;
		if (img=='internet') document[img].src=hinternetpic.src;
	}
	else {
		if (img.substring(0,3)=='ind') document[img].src="img/hind.gif";
		if (img=='avancar') document[img].src="img/havancar.gif";
		if (img=='recuar') document[img].src="img/hrecuar.gif";
		if (img=='internet') document[img].src="img/hinternet.gif";
	}
}

function off(img) {
	if (document.images) {
		if (img.substring(0,3)=='ind') document[img].src=indpic.src;
		if (img=='avancar') document[img].src=avancarpic.src;
		if (img=='recuar') document[img].src=recuarpic.src;
		if (img=='internet') document[img].src=internetpic.src;
	}
	else {
		if (img.substring(0,3)=='ind') document[img].src="img/ind.gif";
		if (img=='avancar') document[img].src="img/avancar.gif";
		if (img=='recuar') document[img].src="img/recuar.gif";
		if (img=='internet') document[img].src="img/internet.gif";	}
}