jQuery UI 1.7.2 Tabs do not work in IE7 with disabled
When using tabs and disabling a tab, IE7 throws the following error:
Object doesn't support this property or method.
The code breaks on:
// Take disabling tabs via class attribute from HTML
// into account and update option properly.
// A selected tab cannot become disabled.
o.disabled = $.unique(o.disabled.concat(
$.map(this.lis.filter('.ui-state-disabled'),
function(n, i) { return self.lis.index(n); } )
)).sort();
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