Stupidly simple regular expression pushState router.
var reru = require('reru');
reru(/.*/, function () {
content.innerHTML = '';
});
reru('^/$', function () {
var p = document.createElement('p');
p.appendChild(document.createTextNode('Welcome'));
content.appendChild(p);
});
reru('^/(\\d{4})$', function (year) {
var p = document.createElement('p');
p.appendChild(document.createTextNode('Archive for' + year));
content.appendChild(p);
});