I am trying to use the jQuery input mask plug-in (jquery.maskedinput-1.3.min.js), and I have searched for several examples/solutions, and my code is exactly as other working exa
remove the space from the ID and then try this
jQuery(function ($) {
$("#POIName").mask("99/99/9999");
});
jQuery selectors follow the standard CSS syntax, so the space in the middle of your ID is actually being treated as a descendant selector. Make your life easier: when dealing with jQuery, keep your IDs and classes limited to alphanumerics, hyphen and that's about it.
To clarify: there is a quote/escape syntax in jQuery, but IMHO it's too annoying to deal with, hence I'm not even giving an example of it.
Spaces are not valid in ID attributes. You should change your id to $("#POIName")
and update your html as well.
Jquery-ids-with-spaces is a similar question that you may find intersting.