/* dom ready check  */
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

/* replace _blank target for new window. Use: rel="external in markup to activate; */
function externalLinks()
{
	if(!document.getElementById) return;

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


addLoadEvent(externalLinks);