// JavaScript Document

var win_popup = null;



function openWindow( url, name, params, w, h )

{

      var ah = window.availHeight;

      var aw = window.availWidth;



      var l = (aw - w) / 2;

      var t = (ah - h) / 2;



      params += params == "" ? "" : ",";

      params += "left=0,top=0,height="+ah+",width="+aw;



      //close previous opened popup

      if (win_popup && win_popup.open && !win_popup.closed)

      {

         win_popup.close();

      }

      //---

      win_popup = window.open( "", name, params );

      win_popup.location.href = url;



}