Created Issue: _setFocus:function(a){$get("__tab_"+a.get_element().id).focus()},_header_onclick:function(b){var a=this;b.prevent [27255]

on IE 8
_setFocus:function(a){$get("__tab_"+a.get_element().id).focus()},_header_onclick:function(b){var a=this;b.prevent

_setFocuse is not check if the element is visible!!