var infoWin;
function showPopup(url, name) {
  var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1 ;
  var is_opera  = navigator.userAgent.toLowerCase().indexOf('opera') > -1 ;
  if (infoWin && is_opera) infoWin.close () ;

  if(!infoWin || infoWin.closed){
    infoWin = window.open(url, name, "width=450,height=500,location=no,menubar=yes,toolbar=no,resizable=yes,scrollbars=yes");
  }else{
    infoWin.location.href = url;
  }
  if (window.focus) infoWin.focus();
  return infoWin;
}