$(function(){
	var conf = {
		className : 'externalLink'
	};
	$('a[@href^="http"]').click(function(){
			var host_name = new RegExp(location.hostname);
			if(!this.href.match(host_name)){
				window.open(this.href, "_blank");
				return false;
			}
	}).addClass(conf.className);
});