page.js

var onDocumentLoad = function ( event ) {

	var name = /[A-z0-9]+.html/.exec( window.location.pathname ).toString().split( '.html' )[ 0 ];
	var path = /\/api\/[A-z0-9\/]+/.exec( window.location.pathname ).toString().substr( 5 );

	var text = document.body.innerHTML;

	text = text.replace(/\[name\]/gi, name);
	text = text.replace(/\[path\]/gi, path);
	text = text.replace(/\[page:(\w+)\]/gi, "[page:$1 $1]" ); // [page:name] to [page:name title]
	text = text.replace(/\[page:(\w+) ([\w|\.]+)\]/gi, "<a href=\"javascript:window.parent.goTo('$1')\" title=\"$1\">$2</a>" ); // [page:name title]
	text = text.replace(/\[link:([\w|\:|\/|\.|\-|\_]+)\]/gi, "[link:$1 $1]" ); // [link:url] to [link:url title]
	text = text.replace(/\[link:([\w|\:|\/|\.|\-|\_]+) ([\w|\:|\/|\.|\-|\_]+)\]/gi, "<a href=\"$1\"  target=\"_blank\">$2</a>" ); // [link:url title]
	text = text.replace(/\*([\w|\ |\-|\/|\+|\-|\(|\)|\=|\,|\.\"]+)\*/gi, "<strong>$1</strong>" ); // *

	document.body.innerHTML = text;

	// Edit button

	var button = document.createElement( 'div' );
	button.id = 'button';
	button.textContent = 'Edit this page';

	button.addEventListener( 'click', function ( event ) {

		window.open( 'https://github.com/mrdoob/three.js/blob/dev/docs/api/' + path + '.html' );

	}, false );

	document.body.appendChild( button );


};

document.addEventListener( 'DOMContentLoaded', onDocumentLoad, false );