// JavaScript Document
function popOpen( name, url, windowWidth, windowHeight )
{ 
  var newWindow = window.open( url, name, "height=" + windowHeight + ",width=" + windowWidth + ",scrollbars=no, resizable=no");
  newWindow.moveTo( (screen.width-windowWidth)/2, (screen.height-windowHeight)/2 );
    newWindow.focus();
}