function menuOver(id, homme){
	var ident = document.getElementById(id);
	ident.style.cursor='pointer';
	ident.src=homme + "images/botones/" + id + "_b.gif";
}

function menuOut(id, homme){
	var ident = document.getElementById(id);
	ident.src=homme + "images/botones/" + id + "_n.gif";
}

function centrarVentana(win, anchoVentana, altoVentana){
	var ancho = screen.availWidth;
	var alto = screen.availHeight;
	var x = (ancho - anchoVentana)/2;
	var y = (alto - altoVentana)/2 - 30;
	win.moveTo(x, y);
}

function abrirVentana(arch, titulo, ancho, alto){
	var parametros = "'directories=no, location=no, scrollbars=no, menubar=no, status=yes, resizable=no, width=" + ancho + ", height=" + alto + "'";
	var win = window.open(arch, titulo, parametros);
	centrarVentana(win, ancho, alto);
}
function abrirVentanaConScroll(arch, titulo, ancho, alto){
	var parametros = "'directories=no, location=no, scrollbars=yes, menubar=no, status=yes, resizable=no, width=" + ancho + ", height=" + alto + "'";
	var win = window.open(arch, titulo, parametros);
	centrarVentana(win, ancho, alto);
}