Something

function redir()
{
 var o=window;
 try
 {
  if(o.dialogArguments)
  {
   var sWN=new String(Math.round(Math.random()*100000));
   var sF="toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=800,height=600";
   var iT=Math.round((screen.availHeight-600)/2);
   var iL=Math.round((screen.availWidth-800)/2);
   sF+=",top="+iT+",left="+iL;
   var op=o.dialogArguments.opener;
   try
   {
    if(op)
    op.open(a_sCW,sWN,sF);
   }
   catch(e)
   {}
   o.close();
   return ;
  }
 }
 catch(e)
 {}
 var sUrl=a_sUrl;
 while(1)
 {
  try
  {
   var oF=o.frameElement.document.parentWindow;
   if(!oF.g_fOwa)
    break;
   o=oF;
   sUrl="";
  }
  catch(e)
  {break;}
 }
 try
 {
  var oW=o.opener;
  if(oW&&oW.g_fOwa)
  {
   var iX=Math.round((screen.availWidth-800)/2);
   var iY=Math.round((screen.availHeight-600)/2);
   o.moveTo(iX,iY);
   o.resizeTo(800,600);
   sUrl="&url="+encodeURIComponent(a_sCW);
  }
 }
 catch(e)
 {}
 o.location.href=a_sLgn+sUrl;
}