function abrir(x,y,z,t) {
	if (navigator.appName == 'Netscape') {
		y = 20 + y;
		z = 20 + z;
		ven = open(x+".htm",x,"width="+y+",height="+z+",status=no,toolbar=no,menubar=no,scrollbars="+t);
	} else {
		ven = open(x+".htm",x,"width="+y+",height="+z+",status=no,toolbar=no,menubar=no,scrollbars="+t);
	}
}