var FireChatURL = 'FireChat.htm';
var win;
function HandleErr() {
  win.location.href = FireChatURL;
  return true;
}

function StartFireChat() {
  window.onerror = HandleErr;
  win = window.open('','firechat','width=460,height=350,top=50,left=50,directories=0,toolbars=0,scrolling=1');
  if (win.IsFireChat) {
    win.focus();
  }
  else {
    win.location.href = FireChatURL;
  }
}