I modified the script slightly so it finds the login link at the top of the page properly.  Give this a try:

$(function(){
$('.CustomLoginLink').click(function(){
$('a[id$="loginLink"]').click();
});
});

The 'a[id$="loginLink"]' looks for an anchor tag with and id which ends with "loginLink".  Based on the page you showed me, this should now work.

Vicki,

 Instead of:

Use:

There is no need for the onclick attribute since this is being handled by the jQuery.  The second aspect is that the CustomLoginLink should be a second class that is assigned (you can assign multiple CSS classes in HTML by just separating classnames with a space)