function wopen(url,wname,width,height,scrollbars,resizable){
  var popup = wname;

  if (window[popup])
  	if(! window[popup].closed) window[popup].close();
  
  window[popup] = window.open(url,popup,"width="+width+",height="+height+",scrollbars="+scrollbars+",resizable="+resizable);
  window[popup].focus();
}