Some tools for making HTML documents from HTML fragments

gistfile1.js

(function() {
"use strict";
var
	  guess_title = function(doc) {
		var
			  h = "h6 h5 h4 h3 h2 h1".split(" ")
			, i = h.length
			, headers
			, header_text
		;
		while (i--) {
			headers = doc.getElementsByTagName(h[i]);
			for (var j = 0, len = headers.length; j < len; j++) {
				header_text = headers[j].textContent.trim();
				if (header_text) {
					return header_text;
				}
			}
		}
	}
	, doc_impl = document.implementation
	, create_html_doc = function(html) {
		var
			  dt = doc_impl.createDocumentType('html', null, null)
			, doc = doc_impl.createDocument("http://www.w3.org/1999/xhtml", "html", dt)
			, doc_el = doc.documentElement
			, head = doc_el.appendChild(doc.createElement("head"))
			, charset_meta = head.appendChild(doc.createElement("meta"))
			, title = head.appendChild(doc.createElement("title"))
			, body = doc_el.appendChild(doc.createElement("body"))
			, charset = "UTF-8"
		;
		if (html.ownerDocument) {
			charset = html.ownerDocument.characterSet;
		}
		charset_meta.setAttribute("charset", charset);
		if (typeof html === "string") {
			body.innerHTML = html;
		} else {
			body.appendChild(doc.importNode(html, true));
		}
		var title_text = guess_title(doc);
		if (title_text) {
			title.appendChild(doc.createTextNode(title_text));
		}
		return doc;
	}
;
exports.guess_title = guess_title;
exports.create_html_doc = create_html_doc;
}());