//外部リンクをrel="external"で開く

$(document).ready(function(){
	var nodes = document.getElementsByTagName('a');
		for (var i=0; i<nodes.length; i++) {
			if (nodes[i].rel == 'external') {
				nodes[i].onclick = nodes[i].onkeypress = function() {
				window.open(this.href,'');
				return false;
			}
		}
	}
});