Using Div/CSS popup instead of javascript alert box

http://www.jquery-dev.com/2008/12/02/jqmodal-jquery-modal-popup-plugin

http://www.84bytes.com/2008/06/02/jquery-modal-dialog-boxes/

http://vision-media.ca/resources/jquery/jquery-popup-plugin-review

http://www.queness.com/post/77/simple-jquery-modal-window-tutorial

http://plugins.jquery.com/project/modaldialog