document.onclick = function(e) {
	e = e || event;
	var t = e.target || e.srcElement;
	while (t && t.nodeType == 1 && t.tagName.toLowerCase() != 'a')
		t = t.parentNode;
	if (t && t.nodeType == 1) {
		var myrel = t.rel;
		if (myrel) {
			var str = 'external';
			var str_len = str.length;
			var str2 = 'lightbox';
			var str2_len = str2.length;
			if (myrel == str2 || myrel.indexOf(' ' + str2) == myrel.length - (str2_len + 1) || myrel.indexOf(str2 + ' ') == 0 || myrel.indexOf(' ' + str2 + ' ') != -1) {
				showLightbox(t);
				return false;
			} else if (myrel == str || myrel.indexOf(' ' + str) == myrel.length - (str_len + 1) || myrel.indexOf(str + ' ') == 0 || myrel.indexOf(' ' + str + ' ') != -1) {
				t.target = '_blank';
			}
		}
	}
}