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;
}