(function (factory){ 
if (typeof define === "function" && define.amd) { 
define(["jquery", "./version", "./focusable"] , factory); 
} 
 else { 
factory(jQuery); 
} 
} 
(function ($){ 
return $.extend($.expr.pseudos, { 
tabbable: function (element){ 
var tabIndex = $.attr(element, "tabindex"), hasTabindex = tabIndex != null ; 
return (!hasTabindex || tabIndex >= 0) && $.ui.focusable(element, hasTabindex); 
} 
}
); 
} 
));