I have a custom coded start page that I use for my web browsers. On this page I have links to various pages as well as a few login boxes. The login boxes have my username and password preset so that I can easily log into various web servers. Can this cause any kind of security problem? For example, could these login boxes be spitting out usernames and passwords to various servers when I click on one of the links in my start page? Am I totally safe?

thanks for advice