Add ASCII-art underlines to H2's

gistfile1.js

// Happy "I can copy and paste and write enough JavaScript to get the thing that I wanted to do done" Day
// - Aaron

String.prototype.repeat = function(times) {
 return (new Array(times + 1)).join(this);
}; // from http://stackoverflow.com/questions/4549894/how-can-i-repeat-strings-in-javascript

function insertAfter(referenceNode, newNode) {
 referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}; // from http://stackoverflow.com/questions/4793604/how-to-do-insert-after-in-javascript-without-using-a-library

var h2s = document.getElementsByTagName("h2");

for(i = 0; i < h2s.length; i++) {
 var e = document.createElement("p");
 e.style.marginBottom = '1.7em';
 e.innerText = '='.repeat(h2s[i].innerText.length);
 insertAfter(h2s[i], e);
}