function PopUpWindow(Wurl,Wname,Wtoolbar,Wlocation,Wdirectories,Wstatus,Wmenubar,Wscrollbars,Wresizable,Wcopyhistory,_width,_height)
{
  Wtop  = (document.body.clientHeight-_height)/2;
  Wleft = (document.body.clientWidth-_width)/2
  nw = window.open(Wurl,Wname,"height="+_height+",width="+_width+",top="+Wtop+",left="+Wleft+",resizable="+Wresizable+",scrollbars="+Wscrollbars+",toolbar="+Wtoolbar+",menubar="+Wmenubar+",location="+Wlocation+",status="+Wstatus+",directories="+Wdirectories);
}