What can make jQuery's unbind function not work as expected?
问题 Have a look at the following code (additionally, you will need jquery.js, jquery.viewport.js and jquery.scrollTo.js). The behaviour I would expect from this script is that whenever I scroll the page, the red rows ( <tr> elements with class alwaysVisible ) should be inserted just underneath the top-most visible row ( <tr> element) of that table. Then, the page should be scrolled so that the first of these red rows appears "exactly" at the top of the viewport. What actually happens is that