Adding the sign up function.
Improving the dbSignUp function.
Improving the CSS and JS files loading.
Correcting the default.js file loading and adding the jQuery library.
Adding classes to the navigation tag.
Correcting the adding and the removing nav_a_hover class process.
Adding ids to the header and navigation tags.
Adding CSS style to the sign up form.
Adding the signup's error messages.
Correcting the sign up form's style and adding some effects.
Disabling the webkit form input shadows.
Verifying the sign up form's input data.
Securing the POST variable decomposition.
Securing the sign up from.
Correcting the CSS and JS effects.
Creating the sign in page.
Adding the sign in form's structure.
Styling with CSS the sign in form.
Adding JS functions to the sign in form.
Adding the sign in function.