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

function external() {
 if (document.getElementsByTagName) {
  var i, a;
  a = document.getElementsByTagName('a');
  for (i in a)
		if(a[i].rel == 'external') a[i].target = '_blank';
 }
}

window.onload = external;

/* external.js */