function msnoperate(action, msn) {
	var actionArray = new Array();
	actionArray = {
		'add' : 'http://go.discuz.com/?app=msn&linkid=5&msn=' + msn,
		'chat' : 'http://go.discuz.com/?app=msn&linkid=6&msn=' + msn
	}

	if(messengerInstalled()) {
		window.open(actionArray[action]);
	} else {
		window.open('http://go.discuz.com/msn/msn.html','_blank','width=571, height=498');
	}
}

function messengerInstalled() {
      try {
            new ActiveXObject("MSNMessenger.P4QuickLaunch");
            return true;
      }
      catch (e) {
            return false;
      }
}