// apagar no futuro
function changeLink(dir, element, over) {
	document[element].src = dir + element + over + ".gif";
}

// menu
function changeArrow(button, over) {
	document[button + "_arrow"].src = "images/arrow" + over + ".gif";
	document[button].src = "images/" + button + over + ".gif";
}


var mousePos;
function changeButton(button) {
    mousePos = document[button].src;
    document[button].src = "images/" + button + "_over.gif";
}
function resetButton(button) {
    document[button].src = mousePos;
}