For journal alerts, click on Publications and then uncheck any category except Journals. Find click on any journal title in the list. You'll then see a list of all the articles from that journal and links to set up an email alert or an RSS feed.
The resulting list should be only journals. Click on the one for which you want to set up an alert.
Near the top of the page you should see links to set up an email alert or RSS feed. Further down the page you should see a list of all the available articles in that journal.