Change external links' target = '_blank'

onload.js

$(function(argument) {
    // set target=_blank for all external links
    // credit: http://stackoverflow.com/questions/2910946/test-if-links-are-external-with-jquery-javascript
    var nodes = document.getElementsByTagName("a"), i = nodes.length;
    var regExp = new RegExp("//" + location.host + "($|/)");
    while (i--) {
        var href = nodes[i].href;
        var isLocal = (href.substring(0,4) === "http") ? regExp.test(href) : true;
        if (!isLocal)
            nodes[i].target = "_blank";
    }
});