QuickLook Feature
The product list pages of gap.com allow the option to view details in context by displaying the QuickLook button on rollover. What I like is this approach is that provides the option to view the details rather than automatically displaying the entire pop-up on rollover. Automatic pop-ups can be distracting, particularly if they appear when the user is just moving their mouse across the page.
From: The Gap
Add to Cart Bad Browser Back Buttons Card Stack Clear Button Contextual Menu Dates Downloading Drop-down Menu Dynamic Dynamic Menus Ecommerce Edit Email Fade Fields Filed Help Filmstrip Navigation Filtering Fluid Display Forms Global Navigation Help History Home Page Inactive Values Layout Legal Agreements Linear Navigation Login Maps Menus Multiple-select Navigation Paging Palette Password Popup Portal Product Availability Product Details Product List Profile Progress Bar Quick Details Radio Buttons Rank Ordering Registration Scrolling Scroll Wheel Search Selection Sliders Tabbed Browsing Tables Text Editing Web Application Wiki Wizard