For user event to fire, you need to have the script uploaded in the Netsuite file Cabinet , then deploy the script on the Employee record. i.e., a script deployment record needs to be created for it. Please let me know if you are facing any error/issues while you are loading the employee record

Log will work if you are deploying the Client script over any record i.e. if it has a Script deployment record. If you’re deploying the client script over a Suitelet and try checking the logs, it might not work. It depends on the context over which you are executing the client script.  Also, you can try checking the execution logs through the path –

Customization->Scripts-> Scripts Execution Logs