// ==UserScript==
// @name          Override target=_blank
// @namespace     http://mauke.ath.cx/stuff/greasemonkey/
// ==/UserScript==

function neuter(e) {
	if (!(e.tagName === 'a' || e.tagName === 'A')) {
		return false;
	}
	var target = e.getAttribute('target');
	if (!(target && (target === '_blank' || target === '_new' || target === '_cnd' ))) {
		return false;
	}
	e.removeAttribute('target');
	return true;
}

function remove_target(ev) {
	for (var t = ev.target; t && !neuter(t); t = t.parentNode)
		;
}

document.body.addEventListener(
	'click',
	remove_target,
	true
);