/* give anchors with attribute rel="external" a target attribute of "_blank" */

function external() {
	if (document.getElementsByTagName) {
		var i, a;
		a = document.getElementsByTagName('a');
		for (var i = 0; i < a.length; i++) {
			if (a[i].getAttribute('href') && a[i].getAttribute('rel') == 'external') {
				a[i].target = '_blank';
			}
		}
	}
}

window.onload = external;

/* external.js */