function openInNewWindow(target) {
	$(target + " a[rel='blank']").each(function() {
		$(this).attr({
			href: "javascript:window.open('" + $(this).attr("href") + "');void(0);",
			title: "Link opens in new window/tab"
		});
	});
}

<a> instead of <a> to get that green mark in your validator

target = _blank fix

jQuery