this.blankwin = function(){
	var hostname = window.location.hostname;
	hostname = hostname.replace("www.","").toLowerCase();
	var a = document.getElementsByTagName("a");
	this.check = function(obj){
		var href = obj.href.toLowerCase();
		return (!(obj.className=="skipexternal") && href.indexOf("http://")!=-1 && href.indexOf(hostname)==-1) ? true : false;				
	};
	this.set = function(obj){
		obj.target = "_blank";
		obj.className = "external";
	};	
	for (var i=0;i<a.length;i++){
		if(check(a[i])) set(a[i]);
	};		
};

this.addEvent = function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};
addEvent(window,"load",blankwin);

/* 
function stripSub(str) {
  var parts = str.split('.');
  if (parts.length === 3) parts.shift();
  return parts.join('.').toLowerCase();
}

$(document).ready(function() {
  $('a:not(.skipexternal)'.filter(function() {
    return this.hostname && stripSub(this.hostname) !== stripSub(location.hostname);
  }).addClass("external").attr('target','_blank');
}
*/