// Javascript Document


function popup(page) {


  
  var width = 900;
  var height = 600;
  var windowLeft = (screen.width - width) / 2;
  var windowTop = (screen.height - height) / 3;
  var windowProperties = 'height=' + height + ',width=' + width + ',top=' + windowTop + ',left=' + windowLeft + ',scrollbars = 0';
  var obj_window = window.open( page , 'popup', windowProperties);
    }