// JavaScript Document

function WindowOpenCentrado(url, name, param,w, h, perc) 
{ var winX = (screen.availWidth - w)*perc*.01;
var winY = (screen.availHeight - h)*perc*.01;
popupWin = window.open(url, name, 'width=' + w + ',height=' + h +',left=' + winX + ',top=' + winY + ','+param);
}