function filterlinks(){ 
	if (!document.getElementsByTagName) return; 
 
	//external link
	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";
		}
	}
 
	// email
	var maildivider="[arroba]" //enter divider you use to divide your email address strings
	for (i=0; i<=(document.links.length-1); i++){
		if (document.links[i].href.indexOf(maildivider)!=-1){
			document.links[i].href=document.links[i].href.split(maildivider)[0]+"@"+document.links[i].href.split(maildivider)[1];
		}
	} 
} 
//window.onload = filterlinks();
filterlinks();