function blankReplace()
{
	if (!document.getElementsByTagName) 
		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";
	} 
}