function openBrWindow(theURL,winName,features, myWidth, myHeight, isCenter) { //v3.0
  if(window.screen)if(isCenter)if(isCenter=="true"){
    var myLeft = (screen.width-myWidth)/2;
    var myTop = (screen.height-myHeight)/2;
    features+=(features!='')?',':'';
    features+=',left='+myLeft+',top='+myTop;
  }
  window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
}

function abreFoto(foto) { 

	var myLeft = (screen.width-510)/2;
    var myTop = (screen.height-415)/2;
    features=',left='+myLeft+',top='+myTop;

  window.open("foto_grande.php?id=" + foto ,"foto",features+((features!='')?',':'')+'width=510,height=415');
}