function setTarget(){
	var regex =/roadmarks.co.jp/;
	var TargetURL = document.getElementsByTagName('a');
	for(i = 0; i < TargetURL.length; i++){
		if (!regex.test(TargetURL[i])) {
			TargetURL[i].setAttribute('target', '_blank');
		}
	}
}

setTarget();