2010
flashblockdetector
"This is a pure-JavaScript library that detects whether Flash is blocked on the current page due to a Flash blocking extension."
2007
jQuery blockUI/unblockUI
by 3 others (via)Instead of using synchronous ajax (which locks the browser), use asynchronous ajax and prevent user activity using blockUI.
2005
Stopdesign | Making the Absolute, Relative
by 2 others (via)If an ancestor element gets positioned, the positioning context of any descendant element is reset to the boundaries of that ancestor element (the new containing block).
1
(3 marks)