In questo modo farai aprire una pop up centrata a misure predef.

on (release) {
uUrl = "http://www.miosito.it/pagina.html";
wdth = "640";
hdth = "480";
getURL ("javascript:window.open('"add uUrl add" ','nName','width=" add wdth add ",height=" add hdth add ",top='+((screen.availHeight/2)-(" add hdth/2 add "))+',left='+((screen.availWidth/2)-(" add wdth/2 add "))); void(0);");
}




Alex