function externalLinks(){
	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 (href.indexOf("http://")!=-1 && href.indexOf(hostname)==-1) ? true : false;				
	};
	this.set = function(obj){
		obj.target = "_blank";
		obj.className += " external";
            if (!obj.title) {
                obj.title = "Open link in new window";
            }
	};	
	for (var i=0;i<a.length;i++){
		if(check(a[i])) set(a[i]);
	};		
};

window.onload = externalLinks;