/* article page */

	
function openCenterWindow(sUrl, presentationW, presentationH) {
    
    var screenW= 800, screenH =600; // pantalla por defecto
    try {
       screenW = screen.width;
       screenH = screen.height;
    } catch(err) {
      // se queda en tamanyo minimo
    }   
    if (screenW<presentationW || screenH<presentationH) {
      presentationW = screenW;
      presentationH = screenH;
    }
    var presentationLeft = (screenW - presentationW) / 2;
    var presentationTop = (screenH - presentationH) / 2;
    var presentationBounds = "width=" + presentationW + ", height=" + presentationH + 
                          ", left=" + presentationLeft + ", top=" + presentationTop;
    var presentationOptions = "toolbar=no, location=no, directories=no, " + 
                        " status=no, menubar=no, scrollbars=yes," +
                        " resizable=yes, copyhistory=yes, " + presentationBounds;                       
    window.open(sUrl, "_blank", presentationOptions);

   }