Guys, It has been a long time since the first blockUI and "window" plugins (e.g. lightbox/thickbox) became available. However, i still didn't see this piece of code in any of these sollutions. All projects have thesame "bug", you can TAB out of the lightbox, to the underlying page. (For a demo, open any project demo page, open the window and hit TAB a few times. Eventually you will "jump" the page to another location.. Not very user friendly...).
Especially in blockUI this snippet can be usefull: /** * keepFocusInside (The name needs some work) * Basicly it checks to see if the element which wants to receive focus * is a direct child of the SOME_ELEMENT you pass. If not, it returns false. */ function keepFocusInside(oEvent, oParent) { if (oElement = oEvent.srcElement || oEvent.target) { return jQuery(oElement).parents(oParent).length; } else { // For all other browsers return true; } } Usage When the "block" starts: jQuery(document).focus(function(oEvent) { return keepFocusInside(oEvent, SOME_ELEMENT); }); Usage When the "block" ends: jQuery(document).unfocus(function(oEvent) { return keepFocusInside(oEvent, SOME_ELEMENT); }); HTH, Gilles