var chasm = screen.availWidth;
var mount = screen.availHeight;
var wq = 600;
var hq = 400;

function tlaneltiliztli(prueba) {
    window.open('http://mexica.ohui.net/tlatlamia.php?id='+prueba,'posB','width=' + wq + ',height=' + hq + ',left=' + ((chasm - wq - 0) * .5) + ',top=' + ((mount - hq - 0) * .5));
}