enableClosable = function (evt_or_pane) {
		if (!isInitialized()) return;
		var	pane = evtPane.call(this, evt_or_pane)
		,	$T	= $Ts[pane]
		,	o	= options[pane]
		;
		if (!$T) return;
		o.closable = true;
		$T	.bind("click."+ sID, function(evt){ evt.stopPropagation(); toggle(pane); })
			.css("visibility", "visible")
			.css("cursor", "pointer")
			.attr("title", state[pane].isClosed ? o.tips.Open : o.tips.Close) // may be blank
			.show();
	}
@param {(string|Object)}	evt_or_pane
@param {boolean=}			[hide=false]