ns4 = (document.layers)? true:false;
ie4 = (document.all)? true:false;

function activar(capa, imagen, nueva) {

	if (ns4) {
		eval("document." + capa + ".document.images[0].src = '" + nueva + "'");
		}
	if (ie4) {
		eval("document.all['" + capa + "'].document.images['" + imagen + "'].src = '" + nueva + "'");

		}
	}

	var vent = null;
	function openWindow(which,sx,sy,scrollb){
		var scrl = scrollb;
		
		var altura=screen.height;
		var anchura=screen.width;
		var vent_x=(document.all) ? sx+20 : sx;
		var vent_y=(document.all) ? sy+80 : sy;

		var posx=anchura/2-vent_x/2;
		var posy=altura/2-vent_y/2;
		
		if (vent != null && !vent.closed) vent.close();
		
		vent = window.open(which,'attitudesVent','resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+scrl+',width='+vent_x+',height='+vent_y+',screenX='+posx+',screenY='+posy+',left='+posx+',top='+posy+'');
		
		vent.resizeTo(sx,sy);
		vent.focus();
	
	}

var ventana = null;
function abrir_ventana(pagina,ancho,alto) {
	if (ventana != null && !ventana.closed) ventana.close();
	ventana=window.open (pagina,'ficha','toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,width='+ancho+',height='+alto+'');
}

var plano = null;
function abrir_plano(pagina,ancho,alto) {
	if (plano != null && !plano.closed) plano.close();
	plano=window.open (pagina,'plano','toolbar=no,location=no,directories=no,menubar=no,scrollbars=no,resizable=no,width='+ancho+',height='+alto+'');
}

var zona = null;
function abrir_zona(pagina,ancho,alto) {
	if (zona != null && !zona.closed) zona.close();
	zona=window.open (pagina,'ficha','toolbar=yes,location=yes,directories=yes,menubar=yes,scrollbars=yes,resizable=yes,status=yes,width='+ancho+',height='+alto+'');
}

function comprobarMarco (padre) {
	if (window.parent.location == document.location) {
		window.parent.location = padre;
	}
}